B8871 - Office chair BOSS - Free user manual and instructions

Product Type	Office Chair
Brand	BOSS
Model	B8871
Seat Material	PU Leather
Back Material	Mesh
Frame Material	Nylon
Maximum Weight Capacity	250 lbs (113 kg)
Seat Dimensions	20" W x 18" D
Back Dimensions	22" H x 18" W
Overall Height (Adjustable)	35" to 40"
Seat Height Adjustment	Yes, via gas lift
Armrest Type	Adjustable (left and right)
Armrest Dimensions	Not specified (adjustable)
Casters	5 x 2" caster wheels
Base Material	Nylon
Swivel	Yes, 360-degree
Tilt Lock	Yes (standard)
Assembly Required	Yes
Recommended Use	Sitting only (not for reclining)
Care Instructions	Wipe with a damp cloth; avoid harsh chemicals
Package Contents	Back cushion, seat cushion, left/right armrests, 5 casters, gas lift with cover, base, screws (hardware attached to seat bottom)

Frequently Asked Questions - B8871 BOSS

How to assemble the B8871 office chair?

Start by removing all parts from the box. The hardware package is attached to the bottom of the seat cushion. Loosely attach the back cushion to the seat using the provided screws, then attach the armrests (left and right). Insert the gas lift into the base, then attach the seat assembly onto the gas lift. Finally, push in the casters. Tighten all screws fully before use.

How to adjust the seat height?

While seated, lift the lever located under the seat to raise or lower the chair. The gas lift mechanism allows smooth height adjustment. Release the lever at the desired height.

What is the maximum weight capacity?

The B8871 office chair is designed to support up to 250 lbs (113 kg). Exceeding this limit may damage the chair and pose safety risks.

How to clean and maintain the chair?

Use a soft, damp cloth to wipe the PU leather seat and mesh back. Avoid abrasive cleaners or solvents. Regularly check and tighten all screws. Lubricate moving parts if needed.

Are the armrests adjustable?

Yes, the left and right armrests are adjustable. Typically they can be raised or lowered by pressing a button on the armrest mechanism. Refer to the manual for exact instructions.

What should I do if the gas lift fails?

If the seat does not hold height, the gas lift may be defective. Contact customer support for a replacement. Do not attempt to repair the gas lift yourself.

Can I replace the casters?

Yes, the casters are replaceable. Simply pull the old ones out from the base and push in new ones. Ensure they are the same size (typically 2-inch) and type for floor protection.

Is the chair ergonomic for long hours?

The chair features a mesh back for breathability and adjustable armrests. However, for prolonged use, consider additional lumbar support. It is suitable for moderate office use.

How to tighten the screws properly?

During assembly, insert screws loosely first, then when all pieces are aligned, fully tighten all screws. Use the provided Allen key or screwdriver. Overtightening may strip threads.

Where can I find spare parts?

Spare parts such as casters, gas lift, or armrests can be ordered from the manufacturer's website or authorized dealers. Use the model number B8871 when searching.

USER MANUAL B8871 BOSS

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

MODEL:B8871

(1)x1	(2)x1	(3)x1 (L)x1 (R)
Back Cushion	Seat Cushion	Left-ArmRight-Arm
(4)x5	(5)x1	(6)x1
Caster	Gas Lift W/ Cover	Base
(7)x1

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.

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