Specification:Name: 2GT Timing Pulley GT2 Synchronous Wheel With StepMain Material: Aluminum alloyType: BF TypeTeeth Pitch: 2mmTeeth Number: 60 70 eighty 90 TeethBore: 4/5/6/6.35/8/10/12/12.7/14/15/16/17/18/19/20/25mmSlot Width: 7mm 11mm (suitable for timing belt width 6mm 10mm)Application:Suitable for transmission componentsPackage :Packing : Plastic bag / Carton box.Quantity : According to your Choose!