Octane Lighting 5-3/4" 4x6" High Beam Headlight Plug Adapter PAIR TWO New Ceramic Plug Adapters 3-Hole Female Sockets 2-Pin Male Plugs Ceramic Plugs for High Heat Protection Used to Convert 3-Pin H4 Low Beam Headlights to 2-Pin High Beam Headlights Works with H4 5-3/4" 4x6" Headlights Interchange: 4000/5001, H5001/H5006, H4656/H4651 4652/4651 Qty: 2 Plugs 5-3/4" HEADLIGHTS CERAMIC H4 HEADLIGHT PLUG THIS FOR ONE HEADLIGHT 12 VOLT H4 WIRING SOCKET PLUG. THIS IS A DIRECT PLUG AND PLAY CERAMIC H4 HARNESS FOR CARS WITH (4) 5-3/4" HEADLIGHTS FOR THE HIGH AND LOW BEAMS. THIS PLUG WILL CONNECT DIRECTLY INTO YOUR CARS WIRING AND INTO YOUR HEADLIGHTS AND WILL NOT MELT LIKE STANDARD PLUGS BECAUSE THIS PLUG HAS A CERAMIC END TO WITHSTAND THE HIGH HEAT PRODUCED BY HALOGEN BULBS.