Replacement For - Suitable for H7 LED; OE: RX-8 G14H-51-0X7 G14H510X7 G14H51; for Mazda 3 5 6 MX-5 CX-5 CX-7. Function - In order to install the H7 LED bulb steady in your headlamp housing, you maybe need a bulb holder. Our LED adapters are used to hold LED bulbs firmly. Material - LED Headlight Socket Adapters are made of durable quality material, heat resistant, durable and not easy to break. Easy Installation - Just pry out the old Headlight Socket and plug these new sockets into your LED bulbs. Package List - 2pcs LED Headlight Bulb Adapter Base