We offer ENGINAIRE pre-cleaners for Compressors upto 20000 CFM. The photograph shows 9 precleaners each of 2000 CFM fitted on compressor. Pre-cleaners not only save on filter life but also on energy as the air box gets filled faster ENGINAIRE is made in USA. The precleaners need no power and is suction driven. No maintainence required. There are no replaceable parts.