ER505L Different from common halogen bulb, xenon halogen bulb shining with super blue. Comparing with common halogen bulb, brightness of xenon halogen bulb’s increased 30%. Easy to install and need not change circuit and electrotimer. Satisfy all kinds of car-checking demands. This HID headlight requires no modification. Will fit any H4 compatible cars (Comes in a pair, twin pack). Super/hyper blue HID look. Not compatible with HID conversion kits.   Package Details Weight: 124.12 g Size: 11*10*5.5 cm Package Includes 1 × Pair of H4 Blue HID Xenon Halogen Bulb Headlight 60/55W