[Irregular Tooth Design]Featuring irregular teeth and concave-convex design to make sure smooth and fast shifts These chainrings are made from high quality material, make suring they can handle the abusive ways of the trail. and high quality Made of high quality materials, and practical Colour:Black Material:Metal Type: Five claws-large plate 50T-110BCD Package Contents: 1x Road bike crankset repair parts Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.