TNA250F - Office chair Sidiz - Free user manual and instructions
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| Product Type | Office chair |
| Brand | Sidiz |
| Model | TNA250F |
| Weight Capacity | 120 kg (265 lbs) |
| Overall Width | 70 cm (27.6 in) |
| Overall Depth | 70 cm (27.6 in) |
| Overall Height Range | 110 - 130 cm (43.3 - 51.2 in) |
| Seat Height Range | 45 - 55 cm (17.7 - 21.7 in) |
| Seat Width | 50 cm (19.7 in) |
| Seat Depth | 45 - 50 cm (17.7 - 19.7 in) |
| Backrest Height | 60 cm (23.6 in) |
| Armrest Height Range | 25 - 35 cm (9.8 - 13.8 in) |
| Seat Material | High-density foam with fabric upholstery |
| Backrest Material | Mesh for breathability |
| Base Material | Nylon with 60 cm diameter |
| Caster Material | Polyurethane (PU) for hard floors |
| Gas Lift Class | Class 3 (SGS certified) |
| Adjustable Features | Seat height, tilt tension, tilt lock, lumbar support, armrest height (3D adjustable) |
| Weight of Chair | 15 kg (33 lbs) |
| Cleaning Instructions | Wipe with damp cloth; do not use harsh chemicals |
| Safety Warnings | Do not exceed maximum weight; use on stable, level surface |
| Spare Parts Availability | Contact Sidiz customer service or visit official website |
| Warranty | 5 years on frame and mechanism, 2 years on foam and upholstery |
Frequently Asked Questions - TNA250F Sidiz
How do I adjust the seat height?
Use the lever under the seat to raise or lower the chair. While seated, lift the lever to release the gas lift and adjust to your desired height. Release the lever to lock.
How do I lock the tilt mechanism?
Pull the tilt lock lever (usually located under the seat) to engage or disengage the tilt lock. When locked, the backrest stays in a fixed position.
How do I adjust the lumbar support?
The lumbar support is adjusted by turning the knob on the back of the chair. Turn clockwise to increase support, counterclockwise to decrease.
How do I clean the mesh backrest?
Use a soft brush or vacuum with a brush attachment to remove dust. For stains, gently wipe with a damp cloth and mild soap. Let it air dry completely.
What is the weight capacity of this chair?
The maximum weight capacity is 120 kg (265 lbs). Do not exceed this limit to ensure safety and durability.
Are the armrests adjustable?
Yes, the armrests are 3D adjustable: height, width, and depth. Press the buttons under the armrest to adjust each dimension.
How do I assemble the chair?
Refer to the included assembly manual. Generally: attach the base to the gas lift, mount the seat plate, then attach the backrest. Use the provided tools and tighten all screws.
What materials is the chair made of?
The backrest is mesh, the seat is high-density foam with fabric upholstery, the base is nylon, and the casters are polyurethane suitable for hard floors.
How long is the warranty?
Sidiz offers a 5-year warranty on the frame and mechanism, and 2 years on the foam and upholstery. Keep your purchase receipt.
Can I replace the casters?
Yes, the casters are replaceable. Contact Sidiz customer service or purchase compatible casters from the official website. They are standard 11 mm stems.
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