Inch Trapezoid H Synchronous Belt Type Pitch 12.7mm(0.5inch) Belt Height 4.30mmTooth Height 2.29mmWidth 075(19.1mm) 100(25.4mm) 150(38.1mm) 200(50.8mm) Neoprene Rubber Fiberglass in Closed-loopTrapezoid H Timing Belt for General purpose timing pulleys.suitable for torque transmission and light-weight load conveyance.