1. Product Overview
The UOCFYK Ergonomic Mesh Swivel Task Chair, model C-3718-5A, is engineered for comfort and functionality in diverse work environments. This chair features a breathable mesh back, a high-density foam seat, adjustable height, integrated lumbar support with storage, a footrest, and 360-degree swivel casters for enhanced mobility.

Image 1: UOCFYK Ergonomic Mesh Swivel Task Chair (Black)
2. Safety Information
Please read and understand all safety instructions before assembly and use. Failure to follow these instructions may result in injury or product damage.
- Weight Capacity: Do not exceed the maximum weight capacity of 250 pounds (113 kg).
- Assembly: Ensure all bolts and screws are securely tightened before using the chair. Periodically check and re-tighten as needed.
- Usage: Do not stand on the chair. Use the chair on a level and stable surface.
- Children: Keep small parts and packaging materials away from children to prevent choking hazards.
- Maintenance: Do not use harsh chemicals or abrasive cleaners on any part of the chair.
3. Package Contents
Verify that all components are present before beginning assembly. If any parts are missing or damaged, please contact customer support.
- A: Backrest (x1)
- B: Seat (x1)
- C: Armrests (1L, 1R) (x2)
- D: Mechanism (x1)
- E: Gas Lift (x1)
- F: Base (x1)
- G: Legs (integrated into base)
- H: Casters (x5)
- I: Bolts for Armrests to Backrest (x4)
- J: Bolts for Seat to Armrests (x6)
- K: Bolts for Legs to Base (x10)
- L: Bolts for Mechanism to Seat (x4)
- M: Wrench (x1)
- N: Foot Ring (x1)

Image 2: Product dimensions and component overview.
4. Assembly Instructions
Follow these steps carefully to assemble your UOCFYK Ergonomic Mesh Swivel Task Chair.
Video 1: Assembly Guide for UOCFYK Drafting Chair. This video demonstrates the step-by-step process of assembling the chair, including attaching the base, casters, gas lift, foot ring, armrests, and seat mechanism.
- Attach Legs to Base: Turn the base (F) upside down. Insert the five legs (G) into the central hub of the base. Secure each leg with two bolts (K) using the provided wrench (M).
- Install Casters: Press the five casters (H) firmly into the holes at the end of each leg (G) until they click into place.
- Insert Gas Lift and Foot Ring: Remove the protective cap from the top of the gas lift (E). Insert the gas lift (E) into the center hole of the foot ring (N). Lift the foot ring upward to secure it to the gas lift. Then, insert the gas lift (E) into the center hole of the base (F).
- Attach Armrests to Backrest: The armrests (C) are marked "L" (Left) and "R" (Right). Align the armrests with the backrest (A) and secure them using bolts (I) x4. Initially, tighten these bolts to approximately 50% to allow for minor adjustments.
- Attach Seat to Armrests: Turn the seat (B) upside down. Ensure the "FRONT" marking on the seat is correctly oriented. Align the seat with the armrests and secure using bolts (J) x6. Tighten these bolts to 100%.
- Attach Mechanism to Seat: Ensure the "FRONT" direction of the mechanism (D) and the seat (B) are aligned. Attach the mechanism (D) to the underside of the seat (B) using bolts (L) x4. Tighten these bolts to 100%.
- Connect Seat Assembly to Gas Lift: Align the hole on the mechanism (D) with the gas lift (E). Press the chair down firmly onto the gas lift until it is fully secured. Finally, tighten the previously installed bolts (I) x4 for the armrests (C) to 100%.
- Final Check: Verify all connections are secure and the chair is stable before use.
5. Operating Instructions
Familiarize yourself with the adjustable features of your UOCFYK task chair for optimal comfort.
Video 2: Ergonomic Drafting Chair Features. This video illustrates the chair's ergonomic design, comfortable cushion, adjustable height, and integrated storage features in practical use.
- Seat Height Adjustment: To raise the seat, lift the lever located under the right side of the seat while standing. To lower the seat, lift the lever while seated. The seat height can be adjusted from 23.43 inches to 29.33 inches.
- Foot Ring Adjustment: The foot ring's height can be adjusted by loosening the knob on the gas lift, sliding the foot ring to your preferred position, and then securely tightening the knob. The footrest offers an 8-inch adjustment range.
- Lumbar Support and Storage: The chair's backrest provides ergonomic lumbar support. The design also incorporates a convenient storage basket behind the lumbar area for small items.
- Swivel and Mobility: The chair features a 360-degree rotating seat and smooth-rolling casters, allowing for easy movement and repositioning within your workspace.
- Comfort Features: The high-density foam seat cushion with a waterfall edge is designed to reduce pressure on your thighs during prolonged sitting. The breathable mesh backrest promotes air circulation to keep you cool.

Image 3: Illustration of seat height and foot-ring adjustability.
6. Maintenance
Regular maintenance helps prolong the life and appearance of your chair.
- Cleaning:
- Mesh Backrest: Wipe gently with a damp cloth and a small amount of mild soap. Avoid saturating the mesh.
- Fabric Seat: Spot clean with a mild fabric cleaner. Test the cleaner on an inconspicuous area first.
- Frame and Base: Wipe with a soft, damp cloth.
- Regular Checks: Periodically inspect all bolts and screws to ensure they remain tight. Re-tighten any loose fasteners.
- Casters: Keep the casters free of debris such as hair and dust to ensure smooth and quiet movement.
7. Troubleshooting
If you encounter any issues with your chair, refer to the following common problems and solutions:
- Chair is unstable or wobbly:
- Ensure all assembly bolts are fully tightened.
- Verify that the casters are securely inserted into the legs.
- Check if the gas lift is properly seated in both the base and the seat mechanism.
- Seat height not adjusting:
- Ensure the adjustment lever is fully engaged or disengaged as required.
- Check for any obstructions around the gas lift mechanism.
- Casters not rolling smoothly:
- Inspect casters for trapped debris (e.g., hair, lint) and clean them thoroughly.
- Ensure casters are fully inserted into the chair legs.
- Squeaking noises:
- Re-tighten all bolts on the chair.
- Apply a small amount of silicone lubricant to moving parts if necessary, avoiding contact with fabric or mesh.
8. Specifications
| Model | C-3718-5A |
| Brand | UOCFYK |
| Color | Black |
| Material | Premium Mesh, High-Density Foam, Sturdy Metal Frame |
| Overall Dimensions (W x D x H) | 20.08 in x 18.5 in x 48.82 in |
| Seat Height Adjustment Range | 23.43 in - 29.33 in |
| Footrest Adjustment Range | 8 inches |
| Weight Capacity | 250 lbs (113 kg) |
| Item Weight | 29 lbs (13.15 kg) |
| Special Features | Ergonomic Backrest, Lumbar Support with Storage, 360° Swivel, Fixed Handrail |
9. Warranty and Support
For warranty claims, technical assistance, or replacement parts, please contact UOCFYK customer support. Refer to your purchase documentation for specific warranty terms and contact details. You may also visit the official UOCFYK website for further information.