￠8×57.4×262.8×17.4 black spary, used for motorcycle rear shock absorber, drawn from 60Si2Mn oil quenching spring wire, wound into warp, then completed and set by multi-channel processes, and done surface treatment according to the requirements of customers. (With some technical requirements)

Technical Requirements:
1) Total number of coils: 17.4
2) Number of active coils: 15.4
3) Free height: 262.8mm
4) Port deburring
5)Both ends of the surface were wore off, circumference is not less than 3/4
6) Shot blasted: pills  ￠ 0.8mm ~  ￠ 1.2mm, intensity 0.2 ~ 0.45A, coverage of 80%
7) Surface treatment:black spary