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Office Master OM5-G Palladium Grey Task Chair

$768.00 $499.20
(You save $268.80)
Usually ships in 7-10 business days.

Product Description

The Office Master Ergonomic OM5G Chair is a progressive ergonomically designed office chair created to fit a wide range of users without the hassle of adjusting levers or knobs. The OM5 features Body-Activated Motion (BAM) which means this gorgeous chair intuitively responds to your body and movement, making it an excellent choice for multi-user situations. The OM5 chair is impressively simple featuring modern curves paired with clean lines without compromising ergonomic comfort and function. Customize your OM5 to fit the look of your decor. This listing is for the Office Master OM5-G which has a gray frame, if you'd prefer a black frame, please visit the Office Master OM5-B.

The Office Master OM5-G chair's flexible, PolyFlex back provides the exact level of support, in all the right places, for optimal back support and comfort. A lack of levers and locks allows the chair to move with you, promoting better circulation and reducing fatigue. A Flexible waterfall edge on the seat front supports your thighs without pressure or pinching.

Technical Specifications:

Overall height: 37-42"
Back dimensions:
18"w x 21"h
Seat dimensions: 19.75"w x 17-18.5"d
Seat height: 16-21"
Weight capacity maximum: 300 lbs
Warranty: Limited Lifetime

Office Master OM5-G Arm Options:

The OM5 is available without arms, with MR5 height adjustable arms, or MR45 multi-function arms that offer height, fore-aft, side-to-side and pivoting motion.

 Office Master OM5-B Arm Options

Back Options

The PolyFlex back looks great without fabric or can be upholstered for a completely different look and feel.

Choose from black, palladium grey or arctic white PolyFlex.

Office Master OM5 Polyflex back colors

Prefer an upholstered back? Choose from a Zodiac Mesh back or upholster the back to match or contrast with your seat.

Zodiac Mesh

Office Master Zodiac Mesh Swatches

Chair base options

Choose from the standard, black, nylon base or upgrade to a beautiful polished aluminum base.

Office Master chair base options

Floor caster options

Choose from stationary floor glides, 65mm soft casters for hard floors, 50mm reverse braking caster which restricts chair movement when in use, 50mm safety soft casters which brakes when chair is not in use, or rubber casters, perfect for concrete and other hard surfaces.

Office Master caster options


Officemaster OM5-B Fabric Options:

Officemaster has a huge selection of fabrics to choose from to make your ergonomic work stool uniquely yours. Choose from a variety of fabric types and grade options. These fabric choices are endless! There are more options then what is listed. Please contact Ergoprise if you would like to order a fabric not listed. Bring your own fabric is also available adding to the flexibility of design of your OfficeMaster chair.

Grade 1 Fabric Options:

Grade 1 - Basic 1001-1020

Content: 100% Marquesa Lana Backing: Acrylic Width: 54" Finish: Teflon Abrasion: 250,000 Double Rubs

Lightfastness: 40 Hrs. - Class 4 Flammability: Passes California 117-E; CS-191-53

Officemaster Fabric Basic 1001 Charcoal Officemaster Fabric Basic 1002 Gray Officemaster Fabric Basic 1004 Navy
Grade 1 Basic  - Charcoal [1001] Grade 1 Basic  - Gray [1002] Grade 1 Basic  - Navy [1004]
 Officemaster Fabric Basic 1005 Navy  Officemaster Fabric Basic 1013 Burgundy  Officemaster Fabric Basic 1020 Black
 Grade 1 Basic - Navy [1005]  Grade 1 Basic - Burgundy [1013]  Grade 1 Basic - Black [1020]

Grade 1 - Spice 1161-1168

Content: 100% Polyester Backing: Acrylic w/ Teflon Abrasion: 400,000 Double Rubs
Lightfastness: 60 Hrs. - Class 5 Flammability: Passes California 117-E; CS-191-53; BIFMA X5.7-1991; NFPA 260, CLASS 1; UFAC, CLASS 1

Officemaster Fabric Spice 1161 Pepper  Grade 1 Spice - Nutmeg [1163]  Grade 1 Spice - Juniper [1164]
Grade 1 Spice - Pepper  [1161] Grade 1 Spice - Nutmeg [1163] Grade 1 Spice - Juniper [1164]
 Grade 1 Spice  - Sesame [1166]  Grade 1 Spice - Paprika [1167]  Grade 1 Spice - Mint [1168]
Grade 1 Spice  - Sesame [1166] Grade 1 Spice - Paprika [1167] Grade 1 Spice - Mint [1168]

Grade 2 Fabric Options:

Grade 2 - Chess 2291 - 2299

Content: 80% Recycled Polyester, 20% Olefin Backing: Acrylic Finish: Teflon Abrasion: 114,000 Double Rubs
Rating: Heavy Duty Lightfastness: 40 Hrs., Class 5 Flammability: Passes: California 117-E; UFAC Class 1

 Grade 2 Chess - King [2291]  Grade 2 Chess - Knight [2292]  Grade 2 Chess - Castle [2293]  Grade 2 Chess - Bishop [2294]
Grade 2 Chess - King [2291] Grade 2 Chess - Knight [2292] Grade 2 Chess - Castle [2293] Grade 2 Chess - Bishop [2294]
 Grade 2 Chess -Checkmate [2296]   Grade 2 Chess -Queen [2297]   Grade 2 Chess -Pawn [2298]   Grade 2 Chess -Rook [2299]
 Grade 2 Chess -Checkmate [2296]  Grade 2 Chess -Queen [2297]  Grade 2 Chess -Pawn [2298]  Grade 2 Chess -Rook [2299]


Grade 2 - Knack 2542 - 2548

Content: 100% Polyester Backing: Acrylic Finish: Soil and Stain Resistant
Abrasion: 100,000 Double Rubs Rating: Heavy Duty Lightfastness: 40 Hrs., Class 5
Flammability: Passes California 117-E; UFAC Class 1; NFPA 260 Class 1

 Grade 2 Knack - Filament [2542]  Grade 2 Knack -  Reed [2543]  Grade 2 Knack -  Brisk [2544]  Grade 2 Knack - Fresco [2545]
Grade 2 Knack - Filament [2542] Grade 2 Knack -  Reed [2543] Grade 2 Knack -  Brisk [2544] Grade 2 Knack - Fresco [2545]
 Grade 2 Knack - Teak [2546]  Grade 2 Knack - Zest [2547]  Grade 2 Knack - Zing [2548]  
 Grade 2 Knack - Teak [2546]  Grade 2 Knack - Zest [2547]  Grade 2 Knack - Zing [2548]  


Grade 2 - Softsit Fabric 2570 - 2577

Content: 100% Polyester Backing: None;Abrasion:;100,000 Double Rubs (Cotton Duck)
Lightfastness:Grade 4 min. at 20 Hours Flammability: Passes CA Technical Bulletin 117-E

Grade 2 Softsit -Graphene [2570]  Grade 2 Softsit - Basalt [2571] Grade 2 Softsit - Kelvin [2574] Grade 2 Softsit - Molten [2577]
Grade 2 Softsit -Graphene [2570] Grade 2 Softsit - Basalt [2571] Grade 2 Softsit - Kelvin [2574] Grade 2 Softsit - Molten [2577]


 Grade 3 Fabric Options:

Grade 3 - Symphony 3V20 - 3V28

Content: 100% Vinyl Backing: 100% Brushed Polyester Knit Abrasion: 100,000+ Double Rubs
Lightfastness: UV-Resistance 1000 Hours
Flammability: Passes California 117-E; BIFMA; UFAC, CLASS 1; MVSS 302; NFPA 260; IMO A.652 (16) 8.2 & 8.3; May Comply with California 133 when tested with suitable components; Can be treated to pass FAA 25.853

Grade 3 Symphony - Piano [3C20] Grade 3 Symphony - Drum [3V21] Grade 3 Symphony - Trimpani [3V23] Grade 3 Symphony - Flute [3V25]
Grade 3 Symphony - Piano [3C20] Grade 3 Symphony - Drum [3V21] Grade 3 Symphony - Trimpani [3V23] Grade 3 Symphony - Flute [3V25]
Grade 3 Symphony - Trumpet [3V26] Grade 3 Symphony - Cello [3V27] Grade 3 Symphony - Harp [3V28]  
Grade 3 Symphony - Trumpet [3V26] Grade 3 Symphony - Cello [3V27] Grade 3 Symphony - Harp [3V28]  


Grade 3 - Stage 3V50 - 3V59

Suitable for Healthcare use

Content: 100% Vinyl/Urethane Topcoat Backing: 100% Polyester Hi-Loft (TM) Finish: SILVERGUARD (R) & PERMABLOK3 (R) Abrasion: 930,000 Double Rubs
Lightfastness: Passes 1000 Hours
Flammability: Passes California 117-E (Equivalent to BIFMA); NFPA 260 (Equivalent to UFAC) Class1; Boston Fire Dept. Code (BFD 1X-1); FAA/FAR 25.853 (a); Fed. Stnd. 191A Test Method 5903.1 - Vertical Flammability Test; FMVSS 302; IMO A. 652(16) 8.2 & 8.3; NFPA 701 (sma

Grade 3 Stage - Cats [3V50] Grade 3 Stage - Chicago [3V52] Grade 3 Stage - Grease [3V53]
Grade 3 Stage - Cats [3V50] Grade 3 Stage - Chicago [3V52] Grade 3 Stage - Grease [3V53]
Grade 3 Stage - Aida [3V55] Grade 3 Stage - Shrek [3V58] Grade 3 Stage - Fame [3V59]
Grade 3 Stage - Aida [3V55] Grade 3 Stage - Shrek [3V58] Grade 3 Stage - Fame [3V59]

Quick Links to Answers:

How does free shipping work? What are my shipping options? Will my item come assembled? When can I expect my order? Do you ship to my country? My item arrived damaged, what do I do?

What is the handling charge for?

Track Your Package

Free Shipping Program

Most orders over $85 ship FREE within the continental United States. Shipments to Alaska, Hawaii, Canada, Mexico, U.S. territories, APO, and FPO addresses do not qualify for the free shipping program.

Exceptions for Canada - Some products do qualify for free Canadian shipping. Please see our International Shipping page for full information.

General Shipping Information:

  • Most items ship via UPS Ground service. Some smaller items may be shipped via USPS instead. Desks and larger shipments may ship via a freight carrier.
  • If your items ships via common carrier (freight), the freight carrier will call to schedule an appointment for delivery. Our standard/free shipping includes curbside delivery. There may be extra fees for liftgate (lowers the product to the ground), residential, or inside delivery. Call us for more information. Note: It is important for you to immediately inspect freight shipments for damage and to note this on receiving paperwork. Call us immediately if your product arrives with shipping damage.
  • UPS and freight are not available to APO and FPO addresses. Call us if you have questions on shipping options to your location.
  • UPS items do not usually require a signature for delivery but this is at the discretion of the driver. Signature may be required in high risk areas.
  • We will email you an estimated ship date, and tracking information as soon as this is available.

Will My Item Come Assembled?

This will vary by item. Most furniture items require assembly. This is usually easy to do. Contact us if you need support. Assembly and white glove delivery is available for furniture items. Please contact us for a quote.

When Can I Expect My Order?

Every product lists an expected time before shipment. Most small items ship the same or next day. Keyboard trays, monitor arms, chairs, and desks are usually custom configured items that are built to order. Lead times vary by product and manufacturer. Travel time varies depending on shipping method chosen, warehouse location, and your location. If timing is critical, please call us and we'll recommend the method most likely to arrive on time. International orders may encounter delays due to incoming customs.

Do You Ship to My Country?

We do ship most items worldwide. Please see our International Shipping page for full information

My Item Arrived Damaged, What Do I Do?

  • Call or email us immediately. Under most circumstances, we will replace the damaged item at no cost to you. Please see our returns page for full information before returning product.
  • If your item was delivered via a freight carrier, it is important that you inspect it immediately and note any visible damage on the receiving paperwork the freight carrier will ask you to sign. Please sign after inspection.

Handling Charges - Canada & APO

Handling Charges: In order to deliver your products timely, a flat handling charge of $12.95 is applied to all orders shipping to Canada and APO addresses.. Special handling charges are in addition to applicable shipping rates. Surcharges always apply regardless of free shipping offers.

The shipping and handling charge is intended to compensate Ergoprise for the cost of handling your order, packaging the product(s) you have purchased, and delivering it/them to you or to the recipient you designate. Prior to submitting your payment information, you will have the opportunity to review the applicable shipping and handling charges. We do not ship orders to FPO or P.O. Boxes. Please avoid using "vanity addresses," as this could result in a delay in delivery.

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Product Videos

Office Master OM5 Interview With Francisco Romero 05:01

We interviewed the designer of the OM5 Series chair, Francisco Romero. See the ideas behind the birth of the OM5.

  • Office Master ...
    We interviewed the designer of the OM5 Series chair, Francisco...

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