Features: Metal socket adapter for D1S D3S D2H and LED D series bulbs. Easy installation to replacement for the missing or broken headlight bulb socket holder. Please double check the pictures and OE number to make sure this adapter is the same as your stock adapter. Details: Material: Metal Color: Silver Tone Size: 42x36x9mm / 1.65"x1.42"x0.35"(L*W*H) Hole Size: 22mm / 0.87" Fitment: for LED H7 bulbs for Mercedes Benz B Class G series ML series SLK R171 Please Note: Please ensure this part is suitable for your vehicle before purchasing. Please allow 0-3mm difference due to manual measurement This is a non-OEM product, accessory ONLY! Package List:2pcs LED Headlight Bulb Adapter Base