Office Chair Backrest Mechanism Replacement Parts are designed for you who pursue a good . aware of the challenges of long-term sitting to the back, so we carefully created this set of chair back support mechanism replacement parts. High-strength materials and ergonomic design are used to bring a new comfortable experience to your office chair. Features -Color:Black -Material:Steel and plastic -Size:33.50X32.00X22.00cm/13.17X12.58X8.65in -It is extremely simple and convenient to install and operate. No complicated tools or professional skills are required, and the installation can be completed in a few simple steps, making it easy and quick to replace the chair back mechanism. -Adapt to most office chairs on the market, no need to worry about compatibility issues, buy and use it immediately. -Say goodbye to the cumbersome installation process, save , and let you enjoy the upgraded comfort experience faster. -The design will not cause any damage to the original seat during the installation process, protecting your office chair Package list: 1 x set of Office Chair Backrest Mechanism