Made from the same glass as sunglasses made.
-----sun protection -UV 100------------
--------Don't use any chemical.--------
----------Wash only with warm water-------
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if your roll bars not have original holes drill needed .
just remove you original covers and drill in the same places where is original holes on roll bars inners.see last picture.
https://www.youtube.com/watch?v=SHsYK0embQM
https://www.youtube.com/watch?v=mrItXtRS5C4