Bosch has been producing relays for vehicles and other applications for more than 40 years - this vast development experience ensures continuous advancement in design features to deliver optimum performance. Bosch Mini Relays feature a compact design and are used in a wide range of vehicles to perform switching operations. Bosch relays incorporate only premium quality materials for reliable, long-term performance and a 250,000 switching cycle capability. Engineered with high corrosion resistance to ensure long term reliability in harsh environments and conditions. Set Contains: 4 Pins, 12 V, 30 A, black Normal Open Mini Relays