ITEM NAME:Aluminum Timing Belt Pulley 15 Teeth 8mm Bore 16mm Width Stepper Motor G7E7 Aluminum Timing Belt Pulley 15 Teeth 8mm Bore 16mm Width Stepper Motor G7E7 Specifications: Products Teeth: 15 Tooth outer diameter: 22.73mm Gear maximum diameter: 28mm Product bore: 8mm Material: Aluminum Size: Overall width: 18mm Tooth width: 16mm Suitable for 10mm Belt Package contains: 1 x Pulley 1 x Hex wrench Note: Light shooting 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..Tooth width: 16mm. Product bore: 8mm. Products Teeth: 15. 1 x Pulley. Suitable for 10mm Belt. Material: Aluminum. Overall width: 18mm.