Feature:1. Aluminum alloy, surface oxidation treatment, ensuring maximum durability.2. Easy to assemble and disassemble, including 20 / 60 teeth synchronous wheel and 3pcs timing belt.3. Widely used in milling machines, gear forming machines, drilling machines, hobbing machines and other mechanical transmission occasion.4. Easy and convenient for installation and disassemble, reliable and durable to use.5. Wonderful replacement for the old or broken one, directly fitment.Specification:Condition: 100% Brand NewItem Type: Timing Belt PulleyMaterial: Aluminum Alloy Teeth: 60 years & 20 teethPitch: Approx. 2mm / 0.08inAperture: Approx. 8mm / 0.31inBelt Width: Approx. 6mm / 0.24inBelt Length: Approx. 610mm / 24.02in; 852mm / 33.54in; 1220mm / 48.03inSpecification: 3pcs / set.Package List:3 x 20 Teeth Synchronous Wheel3 x 60 Teeth Synchronous Wheel3 x Belt