[Package Include] -- 10pcs * Return Spring
[Material] -- 65Mn Spring Steel
[Size] -- Size = WD * OD * Long
[OD] -- 3mm , 4mm , 5mm , 6mm , 7mm , 8mm , 9mm , 10mm
[Long] -- 5mm , 10mm , 15mm , 20mm , 25mm , 30mm , 35mm , 40mm , 45mm , 50mm
WIDE Used for: Widely used in doors, curtain, automobiles, bicycles, Steel devices, umbrella, kettle, razor, aircraft, antique tape recorder, repair toy, pliers, piano, scissors, electrical, etc