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HEBEI ROCK FILTER MANUFACTORY CO., LTD. is a professional manufacturer and supplier of Heavy Duty and Light Duty Air Filters, Passenger Car Air Filters, Cabin Filters, EcologicalOil Filter Elements, Hydraulic Filter, etc., founded in 2007 locate at Hebei, China. Our skilled workers amount to 50 with 10 years’ rich producing experiences, all the filters made following ISO9001:2000. As label for the stable quality and good performance, ROCKFIL is our registered trademark for the international market.