The AndyMark 14 Tooth 0.375in. Hex Bore HTD Pulley is designed to integrate seamlessly with 9 mm wide, 5 mm pitch HTD belts. Its 3/8 inch hex bore allows for compatibility with standard hex shafts, facilitating easy installation and use. Constructed from durable black polycarbonate, this pulley is engineered for reliability and performance. The pulley is composed of two identical halves that interlock to form a complete unit, ensuring the correct width for the timing belt.