Huicocy 30/40 AMP Relay Harness Spdt 12V Bosch Style 5 Packs 40A/30A high switching capability. Heavy-duty impact molded relay socket with 5 WIRES.White (common), Black (normally closed), and Yellow (normally open). Heavy Duty Wire and construction 16 Gauge Package Include: 5 relays + 5 relay sockets with wires.