Item Type: Synchronous Wheel Product Parameters: 60 Teeth: Inner Hole: Approx. 5mm / 0.2in 40 Teeth: Inner Hole: Approx. 5mm / 0.2in 36 Teeth: Inner Hole: Approx. 5mm / 0.2in 30 Teeth: Inner Hole: Approx. 5mm / 0.2in Bandwidth: Approx. 6mm / 0.2in 1Timing pulley is suitable for timing belt with a width of 6mm, great workmanship, perfect replacement for the old one. 2Made of high?quality aluminum, sturdy and durable, surface oxidation treatment, anti?rust and anti?corrosion. 3Very useful in high speed drives that need to improve belt winding capacity. 4Widely used in 3D printers, milling machines, CNC engine lathes, drilling machines or other mechanical transmissions, etc. 5Can be used with peace of mind, with strict quality control and quality assurance, high safety factor. 1 x 60 Teeth Wheel 1 x 40 Teeth Wheel 1 x 36 Teeth Wheel 1 x 30 Teeth Wheel