Universal Hardware PartsChina CNC 3D Printer Parts Gt2 Timing Pulley 16 Tooth 2gt 20 Teeth Bore 4mm 5mm 6.35mm 8mm Gear Part for Width 6mm 10mm, Find details about China Coupling Pulley, Gt2 Pulley from CNC 3D Printer Parts Gt2 Timing Pulley 16 Tooth 2gt 20 Teeth Bore 4mm 5mm 6.35mm 8mm Gear Part for Width 6mm 10mm