> Springs
Rocket black M140 spring
- Type: M140
- Material: Japanese piano wire
- Color: Black
- Product description:
Product introduction
Type: Rocket M140 black spring
Material: Japan piano wire
Color: Black
Descriptions: This type of spring is used for replacing the original one. Original springs are made of Chinese piano wire. Rocket black springs are made of Japan material, which can stand over 10,000 times pressing test.
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