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10Pcs 20T GT2 Aluminum Timing Drive Pulley For DIY 3D Printer This pulley is for 2mm pitch 6mm width GT2 timing belt. The motor is not included. Specifications: Tooth: 20 (T) Pitch: 2 (mm) Bore: Dia.5 (mm) Material: Aluminum Alloy Belt Width: 6 (mm) Package includes: 10 x 20T GT2 Aluminum timing belt pulley