H1 Adapter for HID H1 Burner Fixing H1 Adapter for Honda Vehicles and More. This is an essential item for securing bulbs when replacing H1 shape genuine lights with HID bulbs that are often used on Honda vehicles. H1 adapter has two shapes, please check the shape and size carefully. Specifications: Size: Please check the image. Weight: Approx. 0.1 oz (4 g) (per piece); Set Contents: Adapter x 2