DNA COTTON AIR FILTER BMW K 1600 GT 2010-2019DNA COTTON AIR FILTER DNA code: P BM16S12 01 OEM filter code: 13717712317 The filter septum consists of four layers of high quality cotton specially developed by DNA. The cotton is inserted between two layers of metal mesh which guarantees a long life of the filter allowing to keep its shape unchanged even under high air pressures. The frame with which the filter is built is in high quality plastic material, this allows to avoid any deformation of the