B307 - Office chair BOSS - Free user manual and instructions

Product Type	Office Chair
Brand	Boss
Model	B307
Overall Dimensions (W x D x H)	Approximately 24 x 24 x 45-50 inches (61 x 61 x 114-127 cm)
Seat Dimensions (W x D)	Approximately 20 x 18 inches (51 x 46 cm)
Backrest Height	Approximately 22 inches (56 cm)
Seat Height Adjustment Range	Gas lift: 17 to 21 inches (43 to 53 cm)
Weight Capacity	Up to 250 lbs (113 kg)
Net Weight	Approximately 35 lbs (16 kg)
Material	Mesh back, padded seat with fabric or leather upholstery
Base Material	Nylon or aluminum
Armrests	Adjustable height and angle
Lumbar Support	Adjustable
Tilt Mechanism	Multi-lock with tilt tension control
Swivel	360-degree
Caster Size	2.5 inches (6.4 cm), suitable for hard floors and carpets
Power Supply	None (manual adjustment)
Main Functions	Seat height adjustment, tilt lock, tilt tension, armrest adjustment, lumbar support
Assembly Required	Yes, minimal assembly
Care and Cleaning	Wipe with damp cloth and mild detergent; avoid harsh chemicals
Safety	Meets ANSI/BIFMA standards; stable base with anti-tip design
Warranty	Limited lifetime warranty on frame, 1 year on parts
Spare Parts Availability	Yes, contact support for caster, gas lift, armrest, etc.
Repairability	Modular design; most parts replaceable

Frequently Asked Questions - B307 BOSS

How do I adjust the seat height on the BOSS B307?

To adjust the seat height, locate the lever beneath the seat cushion. Pull the lever upward while lifting your weight off the chair to raise the seat, or sit on the chair and pull the lever to lower it. Release the lever at your desired height. The gas lift mechanism provides a smooth range of 17 to 21 inches.

Is the BOSS B307 suitable for tall users?

Yes, the chair features a high backrest (22 inches) and adjustable lumbar support to accommodate taller users. The seat height range also allows for comfortable positioning at most desks.

How do I clean the mesh back and fabric seat?

For the mesh back, use a soft brush or vacuum with a crevice tool to remove dust. For the fabric seat, blot spills with a clean cloth and use a mild upholstery cleaner. Avoid soaking the foam. Allow to air dry.

Can the armrests be removed if necessary?

Yes, the armrests are attached with screws beneath the seat. You can remove them by unscrewing the bolts. However, it is not recommended to use the chair without armrests for prolonged periods as they provide support.

What is the weight limit of the B307 office chair?

The maximum weight capacity is 250 lbs (113 kg). The chair is tested to meet ANSI/BIFMA standards for safety and durability.

How do I adjust the tilt tension?

Turn the tilt tension knob located under the seat in the front. Turning clockwise increases resistance, making it harder to recline; counterclockwise decreases resistance for easier recline.

What should I do if the chair rocks or wobbles?

First, check that all caster are fully seated in the base. Ensure that the seat is properly attached to the gas lift cylinder. If wobbling persists, inspect the gas lift mechanism for damage and contact support for a replacement.

Are replacement parts available for the B307?

Yes, we offer replacement parts such as casters, gas lift cylinders, armrests, and upholstery kits. Contact BOSS customer service or visit our website to order.

Does the chair come with a warranty?

The BOSS B307 office chair comes with a limited lifetime warranty on the frame and a one-year warranty on parts and labor for manufacturing defects. Warranty does not cover normal wear and tear.

How do I lock the tilt function?

Pull the tilt lock lever (usually under the seat near the right side) to engage the lock and prevent recline. Push it back to unlock and allow tilting. Some models have a multi-lock mechanism that can lock in multiple positions.

USER MANUAL B307 BOSS

Line drawing of an office chair with five legs and a seat, showing a downward arrow indicating rotation or movement (no text or symbols)

Insert and loosely tighten all screws. When assembly is completed, fully tighten all screws before using. This chair is only intended for sitting. Any other use will void the warranty.

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Line drawing of an office chair with adjustable armrest and wheels (no text or symbols)

Line drawing of an office chair with adjustable arm and legs (no text or symbols)

Customer Service Hotline: [phone] For further assembly instructions, please visit our website at www.bosschair.com

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