This pulley works with 6mm wide GT2 2mm pitch timing belt, it will work perfectly with the GT2 pulley-belt sets we sell. The idler is a good match for the 20T GT2 timing belt pulley driven by stepper motor. This Dual Bearing Aluminum Idler Pulley is a simple and inexpensive solution. Use M5 screws to mount this pulley. Specifications: Color: Sliver Material: Aluminum Alloy Bore Size: 5mm Use with our 6mm width GT2 (2mm) pitch Timing Belt
