1.6mm Expansion Spring Tension Extension Expanding Springs Length 40mm-500mm

Description Material: 65Mn Spring Steel Size: Wire diameter*Out Diameter*Length Internal Diameter =Out Diameter - 2 * Wire Diameter ( For example ，Size 1.6*10*180 mm，means the wire diameter is 1.6mm,the out diameter is 10mm, the length is 180mm,the Internal Diameter is 6.8mm.)

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