Curt Manufacturing 58750 Towing Wiring: Automotive. Buy Curt Manufacturing 58750 Towing Wiring: Wiring - ✓ FREE DELIVERY possible on eligible purchases. RELIABLE PROTECTION. This dust cover is the ideal way to protect your 4-way flat trailer connector when not towing. It protects the wiring terminals against dirt, water, debris and rust to maintain a strong, long-lasting connection. . STANDARD FIT. This connector dust cover features an industry-standard size to fit virtually any trailer 4-flat wiring plug. It is designed specifically for the trailer side of the connection. . LONG-LASTING. This 4-way flat dust cap is made from durable molded black rubber, meaning it will never rust or corrode, in spite of frequent exposure to rain, snow, mud and other elements. . EASY TO INSTALL. This 4-pin wiring cover installs quickly and easily. Just press it onto the trailer plug whenever needed! The friction fit eliminates the need for tools or additional components. . ALWAYS ON HAND. This 4-flat vehicle-trailer wiring dust cover is equipped with an attachment loop to attach to the trailer wiring harness and always stay on-hand whenever needed. . Like trailer hitches and ball mounts, electrical connectors range all over the board in shape, size and capability, but no matter what your trailer's electrical functions are, you need a solid connection to keep the power flowing and ensure safety on the road. CURT electrical connectors are designed and manufactured to give you a reliable connection every time you plug in your trailer. Protect your vehicle-to-trailer wiring connection with a CURT electrical plug cover. This 4-way flat dust cover is made with durable black rubber to easily resist the elements and help maintain good connectivity. It comes with a convenient attachment tab to avoid loss and is specifically designed to fit a 4-way flat plug on the trailer side of the connection. . . .