... , piano steel, alloy steel, iron plated Black color bending spring1.bending spring with wire diameter 2.made of carbon steel, piano ... supplied will be made our all cuetomers satisfied.1. bending spring with wire diameter from 0.08 up to 3. ... steel, piano steel, alloy steel, iron plated steel.3. bending spring is extensively used in telecommunication, computer peripherals, housing appliance, switching ...