Model Number
retractable coil spring
COLOR
black/green/gold/red/blue/brown/yellow/or as you wish
Material
65Mn/60Si2MnA/55CrSi/SAE9254
Certificate
ISO9001:2008 ISO/TS16949
Technique 1
Cold coiling & Hot coiling
Technique 2
Hardened & Tempered
type
car spring suspension
product name
coil spring suspension for 31331133336