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If your original headlight socket is H4 Socket and Not Standard, this h4 9003 3 pin adapter will fix. Suitable for a broad range of industrial and commercial uses;Socket Type : H4/ 9003/HB2 H4 Wiring Harness Hot Matches The H4 to 3 pins wiring harness is a special design and can fits the headlights perfectly! If you buy 7x6 inch led headlights or 4x6 Headlight, and your car socket is not standard, H4 to 3 pin adapter is a "must".