Speed 60500 Line Lock Loc Roll Control Hill Holder Kit Stainless Steel Nickel-plated stainless steel valve assemblies for ultimate corrosion resistance Black chromate heat sinks help to dissipate heat Re-buildable nickel-plated solenoid valve is field serviceable for cleaning or rebuilding 4 threaded ports allow for a separate bleeder or brake line pressure gauge Includes solenoid valve, activation switch, indicator light, fuse, mounting hardware and detailed instructions