This spring kit contains 20 kinds of the most common springs for a variety of applications. 12 Sizes of Compression Springs. 8 Sizes of Extension Springs. Zinc steel plate corrosion-resistant, long service life, strong spring, good elasticity, moderate tension.
Widely used in doors, curtain, automobiles, bicycles, mechanical devices, umbrella, kettle, razor, aircraft, antique tape recorder, repair toy, pliers, piano, scissors, electrical, etc.