Brand new heavy duty SPST relays 12 Volt 30 amp 5-prong relays Mechanical life of 10，000+ cycles These are heavy duty 30A relays.This kit can be used to install electric cooling fans，Electric fuel pumps，Electric water Pumps，Shaved door handles solenoids，Trunk solenoids，Horns. Using this kit will eliminate a high voltage drop in the wire，So it allow your components to work properlyPackage include:5 X 30A Relay (5Pin)