Description This chair base spring knob is an essential accessory for your office chair, providing smooth and effortless adjustments. Designed for computer chairs, swivel chairs, and executive office chairs, it ensures stability and comfort. The sleek design seamlessly integrates with your chair's base, enhancing both functionality and aesthetics. Features -Color:Black -Material:Plastic -Size:11.50X6.00X6.00cm/4.52X2.36X2.36in-Comfort upgrade: equipped with precision spring knobs, this mechanism allows effortless height adjustment to cater to various user heights for enhanced seating comfort.-Stable support: reinforced tray base ensures longterm stability, reducing wobbling during extended use and providing a reliable foundation for your office chair.-Smooth rotation: optimized swivel chair structure enables seamless 360 degree rotation, enhancing flexibility and productivity in your workspace.-Efficient adjustment: designed for quick assembly and disassembly, this mechanism simplifies replacement or maintenance, saving valuable time during office setup.-Universal compatibility: suitable for a wide range of computer chairs and executive chairs, this accessory enhances the overall performance and user experience of your furniturePackage list: 2 x Office Chair Replacement Parts