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Selection
Extension Springs are organized in order of increasing diameter and wire size. Note that in each category the spring rate decreases as the length increases.
Unit of Measure

Specifications

Type

 Extension

Material

 Music Wire

Outside Diameter

 0.24

Wire Diameter

 0.041

Free Length

 2.250

Max. Load

 11.4

Max. Extension

 3.13

Initial Tension

 1.6

Spring Rate

 11.20

Max. Load (SS)

 9.700

Max. Extension (SS)

 3.11

Initial Tension (SS)

 1.3

Spring Rate (SS)

 9.7