... from the fidgets referred above.Features:Filter: 4" Flange Activated Carbon Charcoal Filter Maintenance Free Design Safe and Effective ... available, such as air filter, water filter, oil filter, carbon filter, acid filter, oil purifier, filter bag, bag filter, filter cartridge , filter equipments etc.Reason 4Shanghai ... a very high standard right here in CHINA.Reason 6We can provide sample for quality ...