10M 2GT Timing Belt 20 Teeth GT2 Aluminium Pulley For 3D Printer CNC RepRapGT2 Pulley:Teeth: 20Groove width: 7mmTotal width: 16mmDiameter of bore: 5mmFlange: DoubleMaterial: AluminiumGT2 Belt:Pitch: GT2Width: 6mmLength: 10MFeatures:Durable and practicalDesigned specifically for linear motionGT2 Pulley and GT2 Belt are used together, very convenient to useRound tooth profile guarantees that the belt tooth fits smoothly20 Teeth contact with the belt, that minimizes the chance of the belt slippingsPackage includes:1 x GT2 Belt  10 x GT2 Pulley20 x Screws1 x Wrench(As Pictures)