... 2. Type: spiral 3. style: torsion spring steel spiral torsion spring1. Processing machine: CNC spring machine, Auto spring machine2. Material: steel, stainless steel3. ... so on)12. Customize: all kinds spring such as the compression spring, leaf spring, coil spring, torsion spring, Special-shaped springsEkor metal Co.,Ltd is ... best quality requirements to serve you. steel spiral torsion spring