Upgrade your office chair with this versatile chair base spring knob, designed to fit a variety of chair models. Its user-friendly design makes installation a breeze, providing a secure fit and reliable performance. Whether you're working long hours or enjoying leisure time, this accessory ensures your chair offers maximum comfort and support. Features -Color:Black -Material:Plastic -Size:11.50X6.00X6.00cm/4.52X2.36X2.36in -Adjustable comfort: the springloaded knob offers adjustments, allowing users to find their ideal seating position for maximum comfort -Robust stability: reinforced base construction ensures dependable support, reducing the risk of wobbling or instability during prolonged use -Effortless swivel: designed for smooth rotation, this mechanism enhances chair mobility, making it easier to navigate your workspace -Timesaving maintenance: simplified assembly and disassembly process make replacing or repairing chair parts quick and efficient -Broad compatibility: engineered to fit a variety of computer and office chairs, this accessory upgrades your seating experience with ease Package list: 2 x Office Chair Replacement Parts