Item Type: Antibacklash Spring nut_x000D_ Material: POM_x000D_ Lead: Approx. 8mm / 0.3in 1Special antibacklash nut possess high accuracy and low cost, which is the first choice for DIY engraving machine and printer 2The upgraded T8 antibacklash nut is made of good quality POM material, which is not easy to oxidize and is corrosion resistant 3Excellent anti kickback mechanism increase stability and bring smoother functions, help to solve the problem of 3D printer kickback 4Compatible with for CR10/CR?10S/Ender?3/Ender 3S/Ender3 Pro/Ender 3 V2 3D printers, can also be used with other 3D printers 5These spring nut come with 8mm lead, works for eliminating gap, helps a lot in your work 4 x POM Nut 2 x Spring