12mm NiTi Extension Spring XHeavy .012 x .042 (10/Pack)

Item #: C70-053

  • These premium springs are available in both 9mm and 12mm lengths.
  • Both lengths are available in 5 distinct force levels, with no overlap between tolerance bands.
  • Near-constant force is maintained to 3x extension of active coil length without deformation!
  • True progression of forces from Extra Light (XL) through Extra Heavy (XH).
  • Secure key-ends with force level identification.
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