¢ 6.2 × 58 × 215 × 15.6 white, used for motorcycle rear shock absorber, drawn from carbon steel 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: 15.6
2) Number of active coils: 8.6
3) Free height: 215mm
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: white spray

http://www.Weiyuanspring.com/motorcycle-back-shock-absorber-spring/21