MOQ: 50 sets
Supply Capacity: 8000 sets per month
Delivery Time: 7-30 days depends on the order quantity.
Designed with an integrated lumbar massage module, the U-300 is perfect for users begging for real lumbar relief—especially female professionals and chronic back-pain sufferers.
The 4-way elastic mesh adapts naturally to the body, delivering all-day comfort, while our patented armrest design adds a distinctive edge to your product lineup.
With versatile configurations and two modern colorways(available black and grey), the U-300 helps you meet different market demands without complicating your offering.
Product Specifications
| Product-model | U-300 |
| Warranty | 1 years |
| Optional Accessories | Footrest |
| Chair Frame Material | PP+Glass fiber |
| Chair Upholstery Material | All-way Stretch Mesh |
| Color | Black/Grey, or Customizable |
| NW | 20kg |
| Packag box | LWH：62*39*63cm GW：22kg/1pc/ctn |
| Loading-quantity/40HQ | 456 ctn |
| Packaging Standards | ISTA drop test/mail-order packaging/300 lb burst strength |
| HS code | 9401719000 |
One chair, multiple ways to win your market. By mixing and matching our 5D vs. 4D armrests and our Premium Aluminum Base vs. Detachable Steel bases, you can engineer the perfect cost-to-feature ratio to win the contract.
Go premium with an aluminum base and exclusive 5D armrests, optimize for margin with a detachable steel base and 4D armrests, or land anywhere in between.
A curved mesh headrest that follows the natural cervical spine.
It slides 6.5 cm vertically and extends 4 cm front-to-back. The pillow face itself rotates up to 90°. It locks in the exact angle for any user height or seating posture.
The backrest uses a dual-zone design. The upper frame holds the back in position. The lower section focuses on waist support. All wrapped in high-elastic, breathable mesh.
The entire backrest moves up and down across 4 levels, with 6 cm adjustment range. Pull to the top to reset.
This is where the U-300 stands out. Not just support. Active relief.
The curved mesh lumbar support houses a built-in massage module. Adjustable frequency. Forward and reverse motion. Heating function included, with clear orange light indication.
There’s also a 2 cm depth adjustment via a control knob. Push it forward for stronger support. Pull it back for a softer feel.
PS： Powered by Type-C charging.
The armrest system uses a durable PP base, paired with a PU soft pad for better arm support.
4D Armrests (The Open-Mold Standard): Features height adjustment, depth sliding, width tuning, and a tight rotational angle.
5D Armrests (The Premium Upgrade): Moves 6cm vertically across 9 crisp steps, slides 6cm in depth, and features full 360°rotation. It opens up massive forearm support for specialized work positions.
Uses a wide 52 cm seat frame. It easily accommodates larger, heavier users.
One lever manages the 3-position tilt lock (up to 135°) and controls the chair height. The other lever controls the seat slider, gliding the seat pan 6 cm front-to-back.
Tilt tension is adjusted via an under-seat knob. It offers premium, intuitive ergonomics.
TUV-certified Class-4 gas cylinders. Built for durability and stability.
Tested over 60,000 lift cycles.
Multiple stroke options available: 80 mm, 90 mm, and 100 mm.
Detachable Chrome Steel Base: 700 mm diameter for stability. Detachable design reduces packing size. Lower shipping cost. Comes with a cover cap to keep the look clean.
Die-Cast Aluminum Base: One-piece die-cast construction. More stable. More refined appearance. Same 700 mm diameter. Strong visual upgrade.
Optional PU casters provide a quieter rolling experience. 60 mm diameter for better mobility. Available in black or grey.
The 4-way stretch mesh distributes tension evenly in all directions. Support stays balanced over long hours. No sagging. No pressure points.
The surface feels smooth. Not rough or irritating. Available in black and grey.
All key plastic parts, including the back frame and seat shell, are made from PP+glass fiber material. No recycled mix.
The flip design footrest uses a breathable mesh surface. The dual-bar structure adds stability.
Too many customization options? Reach out now and we’ll help you find the right chair part solutions.
