opt7 weatherproof 7 way flat blade to 4 way pin adapter w/secure tab - for trailer tow hitch and redline tailgate led opt7 <b>the strongest beasts adapt:</b> give your rig the ability to light up any trailer, 5th wheel, camper, uhaul, or lighting accessory that uses a 4-pin connected instead of the standard 7-pin socket. the opt7 7-pin to 4-pin adapter works with any factory oem 7-pin plug for chevrolet, for ford, for dodge, for ram, or for gmc. <br> <br> <b>drive assured:</b> slides perfectly into any oem 7-pin plug and stays on tight with resilient retainer fins. these fins work with your 7-pin dust cover to secure your adapter in place. no wiggle-room, no loose fittings. you can rely on your rear lights working 100% of the time. <br> <br> <b>ready for any situation:</b> whether it's a drive to the lake, or a day at the sun, the rust resistant prongs and heavy duty construction can handle whatever you throw at it. <br> <br> <b>fully covered</b> by our free 90 days warranty offered only by opt7 lighting.