5/16" x .045" x 7-1/8" Steel Extension Springs (6 pcs.)

Diameter: 5/16"
Diameter 2: .045"
Length: 7-1/8"
Material: Spring Steel
Nominal Size: SRM115
Type: Extension Spring
WireDiameter: .045 WG

Box of 6.

Extension springs are wire coils designed to become longer under load. Their turns are normally touching in the unloaded position, and they have a hook, loop or some other means of attachment at each end.