This is a Pair of Universal flexible rubber caps for some fixtures. When installing LED headlights, the fixtures need to be sealed so they don't get moisture or dust in them. Sometimes they have hard or flat caps that conflict with the light. Though the best way to install the LED is with the heat sink on the back of the lamp in the open air, sometimes is is not possible. These caps may help some installations by sealing the fixture, covering the LED, and also increasing the capacity inside so the heat sink can have some air.
The caps are flexible rubber, and can also be used creatively in other ways like the accordion boots we sell, You can cut them, invert them, and have the heat sink fit within. Every vehicle is different so we do not provide specific instructions.
Altered caps are not returnable.
This is a Pair of caps.
Outer inside diameter is 4"
Smallest cap inside diameter is 3", and step are in 1/8" increments, so ensure you whole you are covering is 3 to 4"