Product description
M140 Retro Arms SR25 Spring SiCr with a progressive irregular coil
Main spring made of chrome-silicon steel, for Long type gearboxes. The progressive coil makes it easier to stretch the spring without losing power.
Spring dimensions:
Inner: 11.30 mm
Outer: 14.50 mm
Length: 185 mm| Colour | Grey |
| Product weight [g] | 15 |
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