Features: Enhances your 3D printing Precisions with Timing Pulley, featuring 80 teeth for synchronization and Performances in motion transfer. from Aluminium Alloy, this 2GT Timing Pulley ensures smooth operations with double flange and for 2M Open Synchronous Belts up to 9/10mm wide. for enthusiasts and professional, this timing pulley for anyone involved in 3D printer maintenance or mechanical project assembly. The Timing Pulley for use in various machinery including milling machines, lathes, and other equipment requiring precise motion control. With its easy to install feature using screws and a standard 5mm bore, this 80T Precisions pulley is essential for any 3D printer parts or mechanical transmission. Specifications: Materials: Metal Diameter: 50mm Color: Black, Redness(optional) Package Includes: 1Set 80 Teeth 2MGT Timing Pulley note: Please allow 0-1cm error due to manual measurement. make sure you not mind before bid. Due to the differences between different monitors, the picture may not reflect the actual of the item. Thank you!