6mm Bore Aluminum Timing Pulley 2mm Pitch 20 Teeth 6mm Wide Belt Groove for 3D printer GT26mm Bore Aluminum Timing Pulley 2mm Pitch 20Teeth 6mm Wide Belt Groove for 3D printer GT2 2mm pitch (GT2) 20 teeth 6mm bore 6mm width timing Belt With 2 set screw to secure to the stepper motor shaft. One pulley Most Common Application 6mm shaft stepper motor fits 6mm width timing belt 2mm Pitch Used on Kossel Delta and other similar 3D Printers RepRap