• Replacement Roll Filters for all existing roll filter equipment: American Air Filter Roll-O-Matic*, Continental Conomatic and Conomanual*, Farr Roll Kleen*, Cambridge Electro-Aire*, and all other major automatic roll filter and unit ventilator equipment. • Five media choices: Two grades of glass fiber media and three grades of synthetic media. • All medias consist of progressively dense fibers supported by an integral scrim backing.