1. Introduction
This manual provides detailed instructions for the assembly, operation, and maintenance of your Flysky Ergonomic Office Desk Chair, Model FS-5001H-BK. Please read this manual thoroughly before assembly and use to ensure proper function and longevity of your chair.

This image displays the Flysky Ergonomic Office Desk Chair from both front and rear angles, highlighting its mesh back, adjustable headrest, and armrests.
2. Package Contents
Before beginning assembly, verify that all components are present and undamaged. If any parts are missing or damaged, please contact customer support.
- Chair Backrest
- Seat Cushion
- Armrests (2)
- Gas Lift Cylinder
- Star Base
- Casters (5)
- Mechanism Plate
- Headrest
- Hardware Kit (screws, washers, Allen wrench)
3. Assembly Instructions
Assembly typically takes approximately 20 minutes. Refer to the included installation manual for detailed diagrams. Ensure all connections are secure before use.
- Attach Casters to Base: Insert the five casters into the holes at the end of each leg of the star base. Push firmly until they click into place.
- Insert Gas Lift: Place the gas lift cylinder into the center hole of the star base.
- Attach Mechanism Plate to Seat: Align the mechanism plate with the pre-drilled holes on the underside of the seat cushion. Secure with screws using the provided Allen wrench. Ensure the front of the mechanism plate faces the front of the seat.
- Attach Armrests to Seat: Secure the armrests to the sides of the seat cushion using the designated screws.
- Attach Backrest to Seat: Connect the backrest to the seat assembly. Secure with screws.
- Attach Headrest: Slide the headrest into the designated slot at the top of the backrest.
- Connect Seat Assembly to Gas Lift: Carefully place the assembled seat onto the gas lift cylinder, ensuring it is centered.

An overview of the chair's superior components: SGS Class III pneumatic rod, 360-degree silent universal wheels, high-load-bearing metal five-claw base, and explosion-proof steel connectors.
4. Operational Adjustments
Your Flysky office chair offers several adjustment features to customize your seating experience for optimal comfort and support.
4.1 Seat Height Adjustment
To adjust the seat height, locate the lever on the right side beneath the seat. Pull the lever up while seated to lower the chair, or pull the lever up while standing to raise the chair. Release the lever at your desired height. The chair offers a 4-inch vertical adjustment range.

An image showing a user adjusting the seat height using the lever, demonstrating the 4-inch vertical adjustment range.
4.2 Backrest Recline Function
The backrest can be tilted between 90 and 120 degrees. To adjust the recline, locate the knob beneath the seat. Loosen the knob to allow the backrest to tilt, then tighten it at your preferred angle to lock it in place.

An image showing a user reclining in the chair, illustrating the 90-120 degree backrest tilt adjustment for various sitting postures.
4.3 Headrest Adjustment
The 3D headrest can be adjusted vertically by 2 inches and rotated by 15 degrees to provide optimal support for your head and neck. Simply grasp the headrest and move it to your desired position.

An image showing a user adjusting the 3D headrest, which offers 2 inches of vertical adjustment and a 15-degree rotatable angle for personalized neck support.
4.4 Armrest Adjustment
The armrests feature a 90-degree flip-up design, allowing them to be raised and stowed under a desk to save space. Simply lift the armrests upwards to engage the flip-up mechanism.

This image illustrates the 90-degree flip-up armrests, designed to allow the chair to be stowed under a desk, optimizing space.
5. Ergonomic Features
The Flysky Ergonomic Office Desk Chair is designed to provide comprehensive support for extended periods of sitting.
5.1 S-Shaped Bionic Backrest
The backrest is engineered to conform to the natural curve of the human spine, offering support to the head, shoulders, back, hips, and lumbar region. This design aims to alleviate discomfort associated with prolonged sitting.

Illustration demonstrating how the ergonomic mesh backrest provides support to the neck, chest, and waist, aligning with the natural curve of the human spine.
5.2 High Resilience Sponge Cushion
The seat cushion is constructed from high-density foam, designed for comfort and breathability. Its high elasticity ensures it retains its shape and provides consistent support, preventing fatigue during long periods of use.

Cross-section view of the 3.22-inch thick high-resilience sponge cushion, highlighting its ability to fit the body curve, high elasticity, and resistance to collapse.
6. Specifications
| Brand | Flysky |
| Model Name | FS-5001H-BK |
| Color | Black |
| Product Dimensions (D x W x H) | 28"D x 32"W x 20"H |
| Item Weight | 26 pounds |
| Maximum Weight Recommendation | 320 Pounds (SGS Class III pneumatic rod certified for 300 lbs max load) |
| Recommended User Height | 5'2" - 6'2" |
| Seat Height Adjustment | 4 inches |
| Backrest Recline Angle | 90° - 120° |
| Headrest Adjustment | 2" up/down, 15° rotatable |
| Armrest Style | 90° Flip-up |

Detailed diagram showing the dimensions of the chair, including height, width, and depth, along with a maximum load capacity of 320 lbs and recommended user height range of 5'2" to 6'2".
7. Maintenance
Regular maintenance will help preserve the appearance and functionality of your office chair.
- Cleaning: Wipe down plastic and metal parts with a soft, damp cloth. For mesh and fabric areas, use a mild soap solution and a soft brush, then blot dry. Avoid harsh chemicals or abrasive cleaners.
- Check Connections: Periodically check all screws and bolts to ensure they are tight. Re-tighten if necessary to maintain stability and safety.
- Caster Care: Keep casters free of hair and debris to ensure smooth rolling.
8. Troubleshooting
If you encounter any issues with your chair, refer to the following common problems and solutions:
- Chair Will Not Adjust Height:
- Ensure the gas lift lever is fully engaged.
- Check if the gas lift cylinder is properly seated in the base and mechanism plate.
- Verify that no obstructions are preventing the lever from moving freely.
- Chair Squeaks or Wobbles:
- Check all assembly screws and bolts. Tighten any loose connections.
- Ensure the casters are fully inserted into the base.
- Casters Not Rolling Smoothly:
- Remove any hair, dust, or debris from the caster wheels.
9. Warranty and Support
Your Flysky Ergonomic Office Desk Chair comes with a 3-year after-sales service. If you experience any issues or require assistance, please contact our professional support team. Provide your model number (FS-5001H-BK) and purchase details for efficient service.
For support, please refer to the contact information provided at your point of purchase or on the official Flysky website.





