【High Quality Material】: The Engine Sprocket is Made of SAE 1045 structural High carbon steel, which has High Strength, High Hardness, Wear Resistance, High Temperature Resistance, and is very Suitable for Making Sprocket for Installation on Machines
【Product Specifications】: Front Engine Fixed Small Sprocket with 13 Internal Teeth and 520-15 External Teeth. The Installation Size is 21.7*25mm
【Packaging List】: A 520 Pitch 17 mm 15T Front Sprocket