With spring Total length (mm): 164 Thickness (mm): 9 A (mm): 46 Tip shape (mm): 35.5 Drop prevention string mounting hole: No Applicable chain: Roller chain Applicable range: 410-630 (for vehicles) 35-60 (for industrial machinery) 1/2 x 1/8 (对于自行车)E型固定环3-5