This pre-filter made to cover the engine air filter in some Claas harvester combines. This pre-filter covers the following air filters: Donaldson p780006, BALDWIN pa3606, FILTRON am456, MANN-FILTER c339203, MERCEDES-BENZ 8690940003, FLEETGUARD af25062, HENGST filter e119l, FIAAM fli6872, man 81084016082, UFI 2736100, ALCO filter md7036, man 81083040061, coopers aem2700, MECAFILTER fa3185, SOFIMA s7361a, BOSCH 1457433902, LIEBHERR 7368216, champ laf8657, CLAAS 773670, CLAAS 773671, UNICO filter ae326063, new HOLLAND 89835747, SULLAIR 68529856, UNIFLUX filters xa1556, LIEBHERR 571830308, DONIT filter 4930579, SCT Germany sb3253, SWF 12151, ARMAFILT l3246102, DEUTZ 12189925, DEUTZ 16026336, KNECHT 8796369, MAHLE filter 8796377, clean filters ma1417, KNECHT lx627, WIX filters 42481e, QUINTON HAZELL 42481e, MAHLE original lx627 and LUBER finer laf8657. Our pre-filters are designed to enhance the efficiency of any performance or exposed air filter. The pre-filter is constructed with a proprietary polyester mesh with uniform micron openings, treated with a hydrophobic water-repellent process. The mesh is UV resistant, filters debris down to .005", Is shatter proof in freezing temperatures, and resistant to heat up to 450 degrees. The material is puncture resistant and has elasticity characteristics allowing the threads to return to the original position in the event the threads have been impacted or shifted. The manufacturing process incorporates a welded seam for strength, or reinforced industrial grade thread to fill needle holes and to reduce potential failure points in the material. The top seam utilizes specialized thread and cording to reinforce durability of the top. Pre-Filters are designed to deflect the damaging debris, which clogs air filters, compromising peak air-flow and horsepower.