B991 - Office chair BOSS - Free user manual and instructions

Product Type	Office Chair
Brand	BOSS
Model	B991
Category	Ergonomic Office Chair
Seat Material	Fabric
Back Material	Mesh
Frame Material	Nylon
Base Material	Nylon
Caster Material	Nylon
Gas Lift	Class 3
Maximum Weight Capacity	250 lb (113 kg)
Seat Height Range	16–20 in (adjustable)
Seat Width	19 in
Seat Depth	17 in
Backrest Height	20 in
Overall Height	34–38 in
Base Diameter	26 in
Armrests	Adjustable (height and width)
Tilt Mechanism	Knee Tilt with locking
Assembly Required	Yes
Included Tools	Allen Key (L-shaped)
Warranty	1 Year
Intended Use	Sitting only
Care Instructions	Wipe with a damp cloth; do not use harsh chemicals

Frequently Asked Questions - B991 BOSS

How do I assemble the BOSS B991 office chair?

Place the back cushion flat with brackets facing up. Fit the seat cushion onto the brackets. Insert and loosely tighten the M6 screws (back bar, back cap, arm). Then attach the arm frame. Finally, attach the base with casters and the gas lift. Fully tighten all screws before use.

What tools are included for assembly?

An Allen key (L-shaped wrench) is included. No other tools are required.

How do I adjust the seat height?

While seated, lift the lever under the seat to raise or lower the chair. Release the lever at the desired height.

How does the knee tilt mechanism work?

The knee tilt mechanism allows the seat angle to tilt forward or backward. Use the lever under the seat to lock or unlock the tilt.

What is the maximum weight capacity of this chair?

The maximum weight capacity is 250 lb (113 kg).

How should I clean the chair?

Wipe the fabric and mesh with a damp cloth. Avoid using harsh chemicals or abrasive cleaners.

Is the chair suitable for long hours of sitting?

Yes, it is designed as an ergonomic office chair with adjustable height, tilt, and armrests to support comfortable seating during extended use.

Can I replace parts like casters or gas lift?

Yes, replacement parts are available. Contact BOSS customer service or visit the official website for compatible parts.

What is the warranty period for the B991 chair?

The chair comes with a 1-year warranty covering manufacturing defects. Warranty is void if used for purposes other than sitting.

Where can I find the hardware package?

The hardware package is attached on the bottom of the seat cushion. Check under the seat before assembly.

USER MANUAL B991 BOSS

IMPORTANT NOTICE: HARDWARE PACKAGE IS ATTACHED ON THE BOTTOM OF SEAT CUSHION.

MODEL:B991 B992

(1)	(2)	(3)
Back	Seat & Mechanism	Arm Frame
(4)	(5)
L370 W/Casters	Knee Tilt Gas Lift
(A)-4pcs(B)-1pcs(C)-1pcs(D)-8pcs(E)-1pcs	M6*30 BACK BAR SCREWM6*55 BACK SCREWCAPM6*25 ARM SCREWALLEN KEY

1←(4)	2	5
3	4Place the back cushion (1) lying flat on the ground with brackets pointing up. Fit the seat cushion (2) along the brackets of the back according ↓ to the arrow.

Line drawings of two office chair designs with different armrests and legs (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.