WE ARE OEM IN M EXICO AND WE ARE LOOKING FOR WOUND STRING CARTRIDGE IN POLIPROPILENE ( MEDIA AND CORE ), COTTON MEDIA WITH CORE IN POLYPROPYLENE, CORE STAINLESS STELL, CORE IN TIN AND FIBERGLASS NEDIA WITH CORE IN STAINLEES STEEL FOR 1,5,10, 20,50 AND 100 MICRONS, 10",20",30" AND 40" LENGTH.