Important Safety Information
Please read all safety information before assembly and use.
- Always assemble and use the chair according to the provided instructions.
- Do not exceed the maximum weight limit of 350 pounds.
- Exercise caution when adjusting the height using the Class 3 gas lift to prevent injury.
- Keep the chair on stable surfaces and away from heat sources.
- This chair is intended for use by adults and children aged 12 and up under adult supervision.
Product Overview
The MoNiBloom Ergonomic Office Chair (Model A83-OC-001-BK) is designed to provide comfort and support for extended sitting periods. It features a high back mesh design, adjustable headrest, lumbar support, 3D armrests, and a flexible recline function.

Image: MoNiBloom Ergonomic Office Chair in a modern office setting.
Setup and Assembly
Follow these steps to assemble your MoNiBloom Ergonomic Office Chair. It is recommended to have a clear workspace and refer to the assembly video for visual guidance.
Video: Official assembly guide for the MoNiBloom Ergonomic Office Chair. This video demonstrates the step-by-step process of putting together the chair components, including attaching the backrest, armrests, and base.
General Assembly Steps:
- Unpack all components and verify against the parts list (not provided in this manual, refer to packaging).
- Attach the chair back to the seat mechanism using the provided screws. Ensure all screws are tightened securely.
- Insert the gas lift into the center hole of the five-star base.
- Place the assembled seat and backrest onto the gas lift.
- Test all adjustments to ensure proper function.
Operating Instructions
Your MoNiBloom Ergonomic Office Chair offers multiple adjustment options to customize your seating experience.
1. Height Adjustment
To adjust the chair's height, locate the lever on the right side beneath the seat. Pull the lever up while seated to lower the chair, or pull it up while standing to raise the chair. Release the lever at your desired height. The seat height ranges from 18" to 22.5".

Image: Detailed product dimensions, including overall height and seat height range.
2. Headrest Adjustment
The headrest can be adjusted in two dimensions:
- Height Adjustment: Gently pull the headrest up or push it down to adjust its vertical position. It has an adjustment range of 3.93 inches.
- Tilt Angle Adjustment: The headrest can be tilted up to 30 degrees to support your neck and head comfortably.

Image: Illustration of the 2D adjustable headrest, showing height and tilt angle adjustments.
3. 3D Armrest Adjustment
The armrests offer three-dimensional adjustments for optimal arm and elbow support:
- Height Adjustment: Press the button on the side of the armrest and slide it up or down.
- Forward & Backward Adjustment: Slide the armrest pad forward or backward.
- Rotation Adjustment: Rotate the armrest pad left or right.

Image: Diagram illustrating the three adjustment directions for the armrests: height, forward/backward, and rotation.
4. Seat Sliding Adjustment
To adjust the seat depth, locate the lever or button beneath the seat (often on the left side). Press and hold the button to slide the seat forward or backward by up to 2.5 inches. Release the button to lock the seat in position.

Image: Visual guide demonstrating how to use the seat sliding adjustment for flexible seating positions.
5. Backrest Height and Lumbar Support Adjustment
The backrest features a 5-level adjustable height mechanism with a 2.5-inch adjustment range. To adjust, pull the backrest upwards. It will click into different height levels (L1-L5). To return to the lowest position, pull it all the way up until it unlocks, then push it down. The integrated lumbar support adjusts with the backrest height.

Image: Visual representation of the 5-level adjustable backrest, indicating the 2.5-inch adjustment range and how it impacts lumbar support.
6. Recline Function and Rocking Capability
The chair offers a recline range from 90 degrees (upright working position) to 145 degrees (relaxed position). Use the recline lever (typically on the left side) to adjust the angle. The chair also has a rocking capability. Adjust the tension knob beneath the seat to control the resistance of the rocking motion.

Image: Illustration demonstrating the chair's recline function, from 90 degrees for work to 145 degrees for rest.
Maintenance
Regular maintenance helps prolong the life and performance of your office chair.
- Cleaning:
- For the mesh fabric, use a soft brush or vacuum cleaner to remove dust and debris.
- For spills, gently blot with a damp cloth and mild soap. Avoid harsh chemicals.
- Wipe plastic and metal parts with a soft, damp cloth.
- Inspections: Periodically check all screws and bolts to ensure they are tight. Re-tighten if necessary.
- Casters: Clean casters regularly to remove hair and debris that may hinder smooth movement.
Troubleshooting
If you encounter issues with your chair, refer to the following common problems and solutions:
- Chair does not adjust height:
- Ensure the height adjustment lever is fully engaged.
- Check if the gas lift is properly seated in the base and seat mechanism.
- Verify that the maximum weight limit of 350 pounds has not been exceeded.
- Chair feels wobbly:
- Check all assembly screws, especially those connecting the backrest and seat mechanism, and tighten them securely.
- Ensure the five-star base is fully assembled and the casters are firmly in place.
- Backrest does not stay upright or feels too reclined:
- Verify that the recline lock mechanism is engaged if you desire a fixed upright position.
- Adjust the tilt tension knob (usually a large round knob under the seat) to increase resistance for the recline function.
- Armrests are loose or difficult to adjust:
- Check the screws securing the armrests to the seat.
- Ensure the adjustment buttons/levers are fully pressed or released when attempting to move the armrests.
Specifications
| Feature | Detail |
|---|---|
| Brand | MoNiBloom |
| Model Name | A83-OC-001-BK |
| Color | Black |
| Material | Chenille Mesh Fabric (Seat), Mesh Back, Nylon Frame |
| Product Dimensions (D x W x H) | 29"D x 29"W x 52"H |
| Item Weight | 34.2 pounds |
| Maximum Weight Recommendation | 350 pounds |
| Overall Height Adjustment | 40.5" to 52" |
| Seat Height Adjustment | 18" to 22.5" |
| Seat Depth | 19.5 inches (with 2.5" sliding adjustment) |
| Backrest Height Adjustment | 5-level, 2.5" range |
| Recline Range | 90 to 145 degrees |
| Armrests | 3D Adjustable (Height, Forward/Backward, Rotation) |
| Headrest | 2D Adjustable (Height 3.93", Tilt 30°) |
| Gas Lift | Class 3 |
| Base | 29" Nylon 5-Star Base with Nylon Casters |
| UPC | 840256460193 |
Warranty and Support
For warranty information or technical support, please contact MoNiBloom customer service. Refer to your purchase documentation or the manufacturer's official website for contact details.
Online Support: Visit the MoNiBloom Store on Amazon for additional product information and support resources.







