Spring:StainlesssteelColor :Blue Recommended Voltage:48V Feature:A green 50 Amp connector will Connect to other green 50 Amp Connectors And The positive & Negative will come out correct. SC green connectors will mate with other green connectors of the same size but NOT with Different Color Connectors. Only green-green,Red-Red.,Grey-Grey,Blue-Blue.Application:Often Used With UPS Inverters Battery Connections Forklifts Battery Chargers Solar and Wind Generators Tow Trucks Snow Plows Certifications approved:UL