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OM Seating  |  SKU: AF504

Office Master Affirm Mid Back Ergonomic Office Chair | AF504

$407.55

Office Master Affirm Mid Back Ergonomic Office Chair (AF504) offers simple, dependable ergonomic support with a frameless mesh back and premium Malibu Knit Jacket upholstery, paired with JR-49 arms for a refined, professional look. Designed for professional workspaces—from tech startups to healthcare and education—it blends modern style with all-day comfort.

Highlights

  • Mid-back ergonomic chair with frameless Nightfall black mesh back and Malibu Knit Jacket upholstery, paired with JR-49 arms for a sleek, contemporary appearance.
  • Pneumatic height adjustment (gas lift) for quick seat height changes to fit your desk and posture.
  • EZ back height adjustment to align the back with your spine for better support.
  • 1-stage locking tilt with synchronous seat/back tilt for coordinated movement and comfortable recline.
  • Seat depth adjustment to accommodate different leg lengths and optimize seating depth.
  • Tension knob to tailor tilt resistance to your preference.
  • Dual-tone universal soft casters glide smoothly across floors; Nightfall black mesh is the default color with a standard modern black package (additional charges may apply).
  • Designed for a range of environments, from tech startups and architectural firms to healthcare and educational settings, delivering a balanced blend of class and comfort.

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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 or bariatric are covered under a 7-year limited warranty on all structural components as defined below. Budget series include: BC, SG, ST, and WS. Bariatric series includes: GY4B-26 and GY4B-30.

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.

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