The AndyMark 24T Plastic HTD Pulley Nub Bore is designed for use with 5 mm pitch HTD timing belts. This pulley is compatible with a 9mm wide belt and can be adapted for a 15mm wide belt or two 9mm belts by adding a pulley extension. Constructed from durable polycarbonate, it features a Nub bore and is finished in black. This component is ideal for robotic applications requiring precise timing and synchronization.