| Part name | Material |
|---|---|
| Mainspring | Stainless steel for spring |
| Bracket | SPC trivalent chromate |
| Wire | SUS nylon-coated product |
| Mainspring case | PP |
| Wire terminal | Brass |
Note: The product photo shows the previous specification. In the current specification, the wire outlet section of the bracket has been changed to a burring grommet type.