Trailer & RV Connectors: Trailer Connectors: Heavy-Duty 4-Pole Connectors: 4-pole Connector Sockets: Die Cast (Split Pins). Die cast construction Keyed high impact molded insulators Mounts through hole approximately 1-3/8\" in diameter Special socket housing design conceals and protects connectors against road splash, dirt, etc . 12-24V, 35 amp. Available in 7, 6, & 4 pole configurations Integral cable clamp prevents cable from being pulled loose from connections All sockets contain 2 mounting holes and have a Stainless Steel spring-loaded flap cover Hi Impact molded insulators Brass Terminal Screws for best conductivity Solid Floating Contact pins for maximum contact & easy alignment Extended bumper-type plug interior prevents damage to shell Applications: Tractors, Trailers, RV, Farm Equipment & Cars.