Reese Towpower Professional Series 4-Flat trailer connector is designed to give a longer usable product life. It features an extra layer in protection against abrasion and weather. This 4-Flat trailer connector encompasses enhanced materials over standard self-wired connectors for longer life. This connector is designed to mate with other 4-Flat connectors whether standard or heavy-duty. Jacketed double insulated cable. Strain relief on connector reduces stress on cable. Removal grips molded into connector. Tin plate terminals. Dust cover for terminal protection when not in use.