RUBBER BOOTS FOR HEADLIGHT BULB HOUSINGS.

Rubber Boots to Replace Bulb Caps.

The Rubber boots are designed to replace the rubber boots or plastic caps on the back of headlights in cars or trucks.
The boots come in range of sizes and types to fit almost all the different types and styles of headlight bulb apertures, so that you can easily fit HID or LED bulb replacements into a headlight housing, and get more depth in the back of the headlight.
Sometimes when you change original halogen bulbs to HID or LED, the back of the led or hid bulb juts out further than the original halogen bulb, which makes it difficult to use the original rubber boot or plastic cap. Replacing the original caps, (if needed), can keep the headlight bulb housing sealed and

protected, and alleviate problems caused by water or dust damage.
The room in the back of the headlight between the back of the halogen bulb and the plastic or rubber cap can be limited in size. The replacement caps/boots are then used to give you more space to be able to seal the replacement led or hid bulb easily and effectively eliminating any leakage getting into the headlight.

Reference: 

D the general diameter of the hole that the boot will fit onto. H is the height or depth of space inside the boot. The universal boots have a dual size in the diameter to fit a wide range of headlight bulb cap holes. The two universal boots already have round exit holes in the ends of them for either hid bulbs with "grommets" already on them, or for other applications.
Part Numbers and Sizes:
A1: D80mm x H55mm.
A2: D85mm x H65mm.
A3: D85mm x H55mm.
A4: D95mm x H60mm.

A5: D55mm x H45mm.
A6: D105mm x H65mm.
A7: Universal D67mm, D55mm.
A8: D100mm x H25mm.
A9: Universal D70mm, D55mm.