Name: Mountain bike crankset protective coverMountain bike chain guard / bicycle guard / 4-hole chain guardOutside diameter; 18.5cmThe diagonal distance is 14.5 cmDistance between adjacent holes 9.6cmX10.6 cmIt is rectangular from the center of the hole to the center of the hole and is suitable for 42-tooth 4-hole cranksetsEffectively prevent the chain grease from getting stuck4 screws for each shieldMaterial: Plastic