3D Printer Parts Accessory GT2 20Teeth Bore 5/8mm 20 teeth 2GT Timing Alumium Pulley Fit for GT2-6mm Open Timing Belt 10pcs powge 3pcs 20 teeth gt2 pulley bore 5mm 6mm 6 35mm 8mm 3meters gt2 timing belt width 6mm 2gt belt pulley 3d 20teeth 20t