, high quality. and practical. Designed for linear motors. The pulley is used with the belt and is very convenient to use. The round tooth shape ensures smooth installation of the belt teeth. Twenty teeth are in contact with the belt, minimizing the possibility of belt slipping. Belt: Material: rubber, aluminum, metal Color: Black Length: 2m Width: 6mm/0.23 inch Pitch: Pulley: Color: Silver Diameter: 16mm/0.62 inch Bore Diameter: 5mm/0.19 inch Height: 16mm/0.62 inch Groove Width: 7mm/0.28 inch Flange: Dual Teeth: 20 Setscrews: (two per pulley) Idler Pulley: Color: Silver Diameter: 18mm/0.71 inch Bore Diameter: 5mm/0.19 inch Groove Width: 7mm/0.28 inch Teeth: 20 Quantity: 3 Set (other accessories in the picture is not included) Package Contents: 3 X belt 6 X pulley 6 X idler 12 X twist spring 3 X hex wrench 12 X screws Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.