Features: Our chair replacement parts utilize advanced surfaces protection technology with anti oxidation properties, significantly enhancing their longevity. The solid construction of the seat lift lever handle ensures steadiness, preventing any movement or leaning after installation for a secure seating experience. This chair rotation base is suitable for a range of chair models, including task chairs, computer chairs, conference chairs, and fabric chairs, providing multifunctional use. The chair lift control mechanism is crafted from high-strength steel, capable of supporting heavy weights without bending, ensuring long-term dependability. The seat rotation base plate employs a gas lift mechanism for smooth control, accommodating users of different statures and enhancing overall comfort. Specifications: Component:Iron Size: 23.5cmx19.8cm Attribute: Black Technical parameters: Support 360 degree rotation, strong load-bearing capacity Use scenarios: office, home study, conference room and other occasion Practicality: Easy to install, strong compatibility, improve chair comfort and functionality Package Includes: 1pcs Metal Rotation Base Plate note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you donot mind befores you order. 2.Due to the differences between different monitors, the picture may not reflect the actual color. Thanks for your understandings.