Material: Made of high quality plastic, durable, fine workmanship; Size:40x35x19mm /1.6x1.4x0.75inch Simple structure: This Z-Rod Bearing Holder Already assembled, so you don't need to assemble it by yourself, Easy to install, Easy to assemble and disassemble Advantage: This Lead Screw Bearing mount helps eliminate Z-axis oscillation and greatly improves printing accuracy; If your Z-rod is a little bent, this upgraded adjustable Z-axis lead screw top mount allows for more flexible and convenient screw retention than the old version and make your Z axis lead screws straightly. Package Content: 2PCS Z-Rod Bearing Holder (Already assembled), 2PCS Allen Key Widely Used for Ender 3, Ender 3 Pro, Ender 3 V2, CR-10, CR-10S, CR10 V2 3D Printer