Standard machined finish	Polished	Polished Diamond Cut
Black Anodized	Black Anodized Buffed Edges	Black Anodized Diamond Cut
Black Powder Coat	Black Powder Coat Buffed Edges	Black Powder Coat Diamond Cut
Titanium Gray Anodized	Black Nickel	Chrome

Please note that K&P Engineering’s Filters have a Lifetime warranty on the Materials and Workmanship, NOT the finishes on the housings. In the rare occasion that something were to happen, please contact us or K&P Engineering directly.