Metal Spring is also a type of compression spring, which are made of carbon steel, stainless steel and other metals. Wire size range about 0.1mm and above. The load type of this spring is used for compression and it is available in silver, yellow, blue, white and other colors. Finishing is done by zinc, rust, E-coat etc. Coil and cylindrical are the two styles of metal springs. Metal springs are highly used in push and pull levers, trampolines, screen doors and rocking horses.