Customer Help Line: 0175 3696 726. This bulb holder replaces your standard H7 halogen type fitment by allowing the HID wires from your new bulb to pass through and connect to the ballast. The item "Vauxhall Astra G MK4 Xenon HID H7 Bulb Holders Adapters 1998-2004" is in sale since Tuesday, March 4, 2014. This item is in the category "Vehicle Parts & Accessories\Car Parts\External Lights & Indicators\Bulbs & LEDs".The seller is "aetonline" and is located in Slough. This item can be shipped to North, South, or Latin America, all countries in Europe, Japan, Australia.