1. wound string filter cartridge media : PP( Polypropylene), cotton; 2. ... ; 1. micron filter length : 10'',20'', 30'',40'';2. wound string filter cartridge media: pp, cotton ;3. micron : 1um, ... );8. features : a. fits all the standard housings ; b. low pressure drop, high dirt holding capacity and long service ... d. various filter media fit with various applications. wound string filter cartridge