Features: OOTDTY Made of quality copper material, long service life. Suitable for 6mm width timing synchronous belt. Light weight, good textures, wear-resistance, reliable and stable connection. Great 3D printer accessories. Suitable for Ender3 Series Ender5 CR10 3D printers. Specifications: Material: Copper Applicable Models: for Ender3 Series Ender5 CR10 3D Printers Quantity: 10pcs/pack Package Includes: 10pcs Copper Buckles Note: Please allow 0-1cm error due to manual measurement. Please allow for slight color difference due to different display resolution.