Chair Fit Check product guide
Office Star ProGrid 97720-30 High Back Manager's Chair, Coal FreeFlex
Carpeted offices where a seat slider and 3-way arms matter
Office Star's ProGrid 97720 pairs a mesh back with adjustable lumbar, a padded seat with a slider and 3 inches of listed seat travel, a synchro tilt with what Office Star calls an infinite lock, and arms that move in height, width and depth. The listing claims 275 pounds, but the printed warranty covers users of 250 pounds or less on a 40-hour week.
Listing checked . Confirm the model, included parts and availability before ordering.
Published specifications
- Maker: 28.25 W x 25.75 D x 43.25-46 H in overall
- Maker: seat 20.5 W x 19.5 D in; height 18-21 in; 3 in seat travel
- Maker: synchro control with infinite lock and tilt tension; adjustable lumbar
- Maker: height, width and depth arms; 19.25 in max inside width
- Maker: titanium-finish base with dual-wheel carpet casters
- Warranty: lifetime parts, 3 years fabric and foam, users 250 lb or less
Fit and limits
Strengths
- Seat slider with 3 inches of travel and a synchro control with an infinite lock
- Maker spec sheet decodes the -30 upholstery code on this listing
- Lifetime warranty on cylinder, mechanism, base and casters
Caveats
- Printed warranty is limited to users of 250 lb or less, below the listing's 275 lb
- Listing dimensions disagree with the maker's by up to three inches
- Casters are carpet casters, and no other caster is listed by the maker
What the 97720-30 is
This is Office Star's ProGrid High Back Chair, model 97720, in the Coal FreeFlex upholstery that Office Star codes as -30. The maker's spec sheet lists three standard coverings, Dillon Black, Dillon Blue and Coal FreeFlex, plus a custom fabric programme, and the listing's part number 97720-30 and its title's Coal FreeFlex match that code.
Office Star's feature list is short and specific: a ProGrid back with adjustable lumbar support, one-touch pneumatic seat height, a synchro control with infinite lock, a seat slider and adjustable tilt tension, height, width and depth adjustable PU arms, and a titanium-finish base with dual-wheel carpet casters. The listing's included components are the chair, casters, hardware and assembly instructions.
The adjustments, with the maker's travel figures
The spec sheet gives a seat height range of 18 to 21 inches and a seat travel of 3 inches, listed alongside the seat slider in the feature list. The seat itself is 20.5 inches wide, 19.5 inches deep and 3.5 inches thick. The back is 21.5 inches wide and 25.5 inches high.
For the arms, Office Star gives a maximum inside width of 19.25 inches, a minimum arm height of 25.75 inches from the floor and 7.75 inches above the seat. The listing describes the arms as three-way adjustable in height, width and depth, which matches the spec sheet. The spec sheet describes the synchro control as having an infinite lock, alongside the seat slider and tilt tension.
Maker and listing sizes do not match
Office Star's spec sheet gives an overall size of 28.25 inches wide, 25.75 inches deep and 43.25 to 46 inches high. The listing's bullet says 28.75 by 28.75 by 40.5 to 46 inches, its measurements table says 28.75 deep by 28.75 wide by 46 high, and a second table field says 25.75 by 28.5 by 46 inches.
The low end of the height range differs by almost three inches between the maker and the listing bullet. Use the spec sheet's figures when checking the chair against a desk or doorway. The listing gives an item weight of 56 pounds; the spec sheet gives only a carton weight of 67 pounds and a carton of 37 by 26 by 15 inches.
The weight figure depends on which document you read
The listing's maximum weight field says 275 pounds. The spec sheet does not give a user weight rating at all. The warranty printed in the listing-supplied instructions says all warranties are limited to the original purchaser for normal commercial usage, defined as a standard forty-hour work week by persons weighing 250 pounds or less.
Those are two different kinds of statement, a listed capacity and a warranty condition, but a buyer between 250 and 275 pounds should read them together. Ask Office Star in writing whether the warranty covers you before relying on the listing figure.
Assembly and the printed warnings
The instructions list the parts: base, five casters, pneumatic cylinder, mechanism, seat, back, left and right arms, two knobs with washers, washers, mechanism screws, back-support screws, back screws, a back support and an Allen key. The listing's included components confirm assembly instructions are in the box.
Office Star's warning list says one person at a time, do not use the chair unless all bolts, screws and knobs are tight, check them every three months or as needed, do not over-turn the back tilt knob when decreasing tension, do not use it as a stepladder, use it only for its intended purpose, and use only mild detergent for cleaning. It also carries a warning about the plastic cover.
Lifetime parts, three years on fabric, and the fine print
The printed warranty, which calls these Pro-Line II chairs, gives lifetime coverage on component parts including the pneumatic cylinder, control mechanism, base and casters, and three years on upholstery fabric and foam. The listing's warranty field repeats those terms. Where use runs past 40 hours a week, the warranty drops to five years on all parts and one year on fabric and foam.
To claim, you contact Office Star's parts department with the model number and a description, and obtain a return authorisation. Office Star may supply compatible current parts or repair yours; you prepay freight on parts sent back, and Office Star pays return freight on in-warranty parts. The warranty excludes labour, freight, misuse, alteration, accidents, rust and cosmetic wear, and the instructions give a parts email, fax and toll-free number.
Check the current listing
Confirm the model, included parts and availability before ordering.
Primary sources
- Office Star 97720 ProGrid High Back Chair spec sheet (maker PDF)
- Office Star 97720 / 97728 Manager's Chair instructions and limited warranty (maker PDF on the listing)
Primary sources checked .
Compare with
- HON Ignition 2.0 Mid-Back Mesh Task Chair, Black
Desks where a 17 to 21 inch seat height suits the user
- Steelcase Series 1 Task Chair, Licorice, Carpet Casters
Carpeted rooms, because this build ships with hard casters
- Sihoo M18 Ergonomic Office Chair with Headrest, Black
A padded seat with a mesh back at a 17 to 21 inch seat height
- Steelcase Leap Office Chair, Onyx
People who want separate upper-back tension and lower-back firmness controls
- Steelcase Gesture Office Chair, Tangerine, carpet casters
People who want arms that swing up and in toward the body
- Steelcase Series 2 Office Chair, Graphite, Light Frame
Buyers who want four-way arms, a seat-depth slide and a 400 lb rating
Side-by-side pages, this model next to: Steelcase Leap Office Chair, Onyx, Steelcase Gesture Office Chair, Tangerine, carpet casters.