The FPG air cleaner series is a two-stage engine air cleaner operating in medium to heavy dust conditions. It offers improved reliability and durability with reduced weight and costs. Made of injection moulded high strength plastic, FPG air cleaners offer the flexibility to overcome space limitations for underhood air cleaners. Donaldson® employs innovative plastic materials and production techniques that result in air cleaners that are corrosion-free and lighter in weight than traditional metal air cleaners - yet without sacrificing sturdiness. Extensive vibration testing reveals this to be a more durable design than most metal air cleaners. The filter inside the air cleaner is also quite different from the traditional design one-piece moulded urethane endcaps encase the ends of the media and filter liners, eliminating the metal caps and plastisol potting compound that were traditionally used. The glued on gasket found on axial filters is gone - now, the inside surface of the open end is actually the RadialSeal™ sealing surface.