3D Printer Pulley Replacement 3DINNOVATIONS GT2 3 Bore 20Teeth Aluinu Idler Pulley With Teeth For For 6mm Wide GT2 Belts H-type synchronous pulley wheel. Free delivery and returns on all eligible orders. Shop INCREWAY 5 Pcs GT2 3mm Bore 20Teeth Aluminum Idler Pulley for 3D Printer 6mm Width Timing Belt (Bore 3mm, 20 Teeth Bore Diameter: 3mm;Number of tooth:20T. High quality aluminum alloy material, sturdy and durable. Widely used in milling machine, gear molder, drilling machine, CNC motor lathe, hobbing machine or other machinery transmission occasions Specifications: Bore Diameter: 3mm Number of tooth: 20T Material:Aluminum Alloy Total Weight:35g GT2 Toothed Idler Pulley 20Teeth 5mm Bore 6mm Belt (High Quality Widely used in milling machine, gear shaper, drilling machine, CNC engine lathe, hobbing machine or other machinery transmission occasions.