Gold Series® cartridge dust and fume collectors combine enhanced media performance with ease of service. Collectors use Poly-Tech media, a silicone-impregnated polyester/cellulose media with excellent filtration efficiency and high humidity resistance. In most cases it meets or exceeds the "five mg. per cubic meter" emissions threshold required on non-hazardous dusts. Applications include removal of all types of fine, dry dusts. Farr APC (Air Pollution Control) Air Pollution Control 3505 Airport Road Jonesboro, AR, 72401