2GT 16 Teeth Synchronous Timing Drive Pulley Wheel H=14MM W 6mm Wide Power Transmission Pulleys 16T Inner Diameter: 5MM * FD794 Product Description 2GT 20 Teeth Synchronous Timing Drive Pulley Wheel 6mm Wide 20T 4MM 5MM 6MM 6.35MM 8MM Specifications Model: 2GT Material: Aluminum Tooth Shape:Trapezoid Tooth Pitch: 2 Height:14mm Diameter:13mm (Diameter of tooth part=9.6mm) Inner Diameter: 5mm Side fixing hole:M3 Tooth Width:6mm(suitable for 6mm synchronous belt) Made in China Easy to install, suitable for mannequin toy car. Good choice for drive. Package 50PCS X 16 Teeth 5MM Synchronous Pulley(With 2 screws) 20PCS X Hex wrench