PN 25 - hot water distribution systems, central heatingspec-1 spec-220 * 3 mm 20 * 3,4 mm25 * 3,25 mm 25 * 4,2 mm32 * 4,00 mm 32 * 5,4 mm40 * 5,00 mm 40 * 6,7 mm50 * 5,50 mm 50 * 8,3 mm63 * 7,00 mm 63 *10,0 mm75 * 8.50 mm75 *12.5 mmOur factory produces tow kinds of of PPR-AL-PPR plastic Composite...