BMC Air Filter FM01114_BMC_AIR. The materials used are the best currently available on the market. The filters are made of a single rubber frame to prevent any possible breakage. The filtering element is made of a special cotton fabric (4 layers) soaked in an oil with low stickiness. It is covered by an aluminum net treated with an epoxy solution to be resistant to gasoline vapors and oxidation. Moreover, the cotton has the advantage of being washable and reusable. Durability: washable and reusable, no need for replacement – Wider filter surface – Maximum air permeability (4 layers of cotton) – Higher absorption and filtration – Better pressure drop ratio – Tested by international testing procedures. 1x BMC Air Filter. Product Type: Air Filter. You can send us a message by using the “Questions and answers” section towards the bottom of the page.