Description:Compression springs are open-coil helical springs that are used to absorb shock in a variety of applications. They absorb the energy of a force acting upon them by becoming shorter, store that energy while compacted, and expand as they release the energy. These springs are either placed over a rod, or fitted inside a hole, and are found in a wide variety of applications ranging from the engine and large stamping presses to appliances and lawnmowers, electronics.Feature:1. Spring appearance is round smooth, no black spots.2. Even spacing, highlight curve, stable force, high plasticity, full elasticity.3. 304 stainless steel material, high hardness.4. Compression spring steel wire spring is used for everything from home appliances to motor equipment, motor, etc. as it is the type of spring required.