1. Opel bulb holder, base, adaptor 2. Opel xenon bulb adaptor 3. plug and ... with reasonable price5. easy installation, plug and play1. This adaptor/ holder/ base/ socket is designed to work with Opel xenon bulb ... adaptors.5. Other HID adaptors/ holders/ bases/ sockets are available for BMW-cars, Odyssey, Jetta, Mazada, Opel, etc. HID bulb holder for Opel