Office Master PT78 Paramount Value Tall Back Multi Function Chair

  • PT78 is custom-made and non-returnable. All fabric colors shown on your computer screen are approximate depending on resolution of your monitor. 
Product ID 485


NOTE: The above video demonstrates general adjustment capabilities which vary depending on the model of the chair. The actual functions & appearance of your chair/arm may differ significantly from the video & illustration shown above. For a list of actual capabilities, please see the features list below or call and ask one of our knowledgeable customer service representatives at 1-888-456-3746. (Some options are available as an upgrade option and must be selected at time of purchase).


Office Master PT78 comes from the PT Value Line and is a reliable chair that was built to meet the demands of daily cross-performance use. With a full complement of features that affords users the ability to adjust the chair to their comfort, each of the chairs from the PT value line offers a compelling combination of comfort, style and affordability. PT Value Series designed to accommodate users up to 300 pounds.

Note: Arms sold separately, unless otherwise indicated.


Overall Width 27"
Overall Height 40 - 48"
Back 19.5" W x 22" H
Seat 21" W x 18-21.1" D
Seat Height 17 - 22"
COM 1.5 yards
Carton Weight 57 pounds
UPS Weight 101 pounds
Arms Groups 1 and 4
Weight Capacity 300 lbs
Warranty 12 years Limited


  • Pneumatic lift
  • Tilting backrest
  • Easy back height adjustment
  • Rocking tilt
  • Seat tilting
  • Seat depth adjustment
  • Adjustable lumbar
  • Forward tilting
  • Tension knob

Product Options/Accessories

Frequently Asked Questions

q Do your chairs arrive assembled?

No, our chairs do not arrive assembled. They typically arrive in three pieces (base, seat and back) and can be easily assembled without any additional tools or professional help.

Model PT78
Manufacturer Office Master Chairs
Part Number PT78
Weight lb(s)
Overall Width 27"
Overall Height 40-48"
Back 19.5" W x 22" H
Seat 21" W x 18"-21.1" D
Seat Height 17 - 22"
COM 1.5 yards
Carton Weight 57 lbs
UPS Weight 101 lbs
Arms Groups 1 & 4
Warranty 12 year limited
Weight Capacity 300 lbs

Customer reviews

  • 1 stars 0
  • 2 stars 0
  • 3 stars 0
  • 4 stars 2
  • 5 stars 2
(4.5 out of 4)
Great task chair!

by Justin McBride, Sandy, UT, Nov 28, 2019

I’ve had this chair for a year and I'm very happy with it. It’s comfortable, sturdy, and has all the adjustable features most people need. I recommend getting the memory foam seat. It’s worth the extra money.

great chair

by robert s, san francisco, California, Jan 09, 2018

Great Chair!

Great chair but the feature set was unclear

by Gregory A, Camarillo, California, Aug 30, 2017

So let me start by saying I very much enjoy the chair. Putting it together was easy and it came in a reasonable amount of time. The build quality is very high and the chair is mostly comfortable to sit in, I do feel I have better posture now than I did before getting this chair. My only complaint with the chair is the optional feature of the recline mechanism. It seem the the tilt function of the chair is lost with this mechanism installed which I was not aware of when purchasing the chair. Had I know that I would have just bought the standard mechanism instead of the added cost since I would rather have tilt over recline.

This chair really helps my back to be straight. -+

by Cesar R, California, Jan 19, 2017

I recommend this chair to everyone who care his or her back. I love it :-)

Limited Warranty

Office Master, Inc. (OM) warrants to the original purchaser that its products are free from defects in materials and workmanship for the applicable warranty period, as indicated below.

Should any item fail, OM will at its sole discretion repair or replace, with a comparable product or part, any item found to be defective as a result of normal commercial use (i.e., a single 8-hour shift, 5 days per week).

This warranty does not apply to items subjected to abuse, misuse, neglect, alteration, or damage caused by shipment, storage, accident, fire, flood, or act of God.

Lifetime Limited Warranty - The OM5 Series (including the OM5 Active sub-series), Truly. Series, and Ginny are covered by a lifetime limited warranty on all structural components as defined below.

12-Year Limited Warranty - Unless otherwise specified, all models not classified as budget or 24/7 or heavy-duty are covered under a 12-year limited warranty on all structural components as defined below.

7-Year Limited Warranty - Unless otherwise specified, all models classified as budget or 24/7 or heavy-duty are covered under a 7-year limited warranty on all structural components as defined below. Budget series include: BC, SG, ST, and WS.

Warranty Terms - Within a given model’s applicable warranty period, all structural components, including gas cylinders, wood, metal and plastic parts (i.e., chair frames, bases and control handles) are guaranteed against
structural failure when under normal commercial use. All OM seating comes with a default 275 lbs. weight capacity limit unless otherwise specified by OM.

For all models, consumable items (i.e., casters, glides, etc.) are covered by a 5-year normal commercial use warranty.

Fabrics and Foam - OM in-stock upholstery & foam cushions are covered by a 5-year normal commercial use warranty. Normal wear and tear on fabrics such as wrinkling, dirt accumulation or gathering is not covered. This includes Truly. Series “Jackets” and “Wraps”. Natural, minor variations may exist in color, surface, grain or texture of upholstery materials. As a result, any such variations are not warranted. COM/COL and graded-in fabrics are not covered.

Claims Procedure - Should any item fail, contact the Dealer from whom it was purchased. A photograph of the damage(s)/issue(s) and of the “born-on” label underneath the seat will be required to help OM determine the cause and extent of any issues. If it is determined that a return is necessary, return that item and its product proof of purchase to the Dealer, whereupon that Dealer will send both to OM, freight prepaid. OM will repair or replace the defective part at its sole discretion and return it to the Dealer, freight prepaid. Please email related photos and details for any warranty claims to [email protected].

Returns - Written authorization from OM is required prior to a Dealer returning any failed or defective parts to OM. Any returned defective part(s) will NOT be accepted without this prior written authorization, or a “Returned Materials Authorization” (RMA) # assigned to it.

Warranty Labor - This warranty exclusively covers the repair or replacement of OM parts as determined by OM and does NOT cover any portion of field labor or service and does NOT cover any portion of field labor or service. For information regarding OM’s non-warranty shop time and related charges, please reference a current copy of OM’s pricebook, in the Terms and Conditions section.