1) Professional manufacturer 2) Size:50,76,100mm 3) ISO 9001:2008 4) PE,PP,RPP,PVC, ... .elementsper/m3Packing factorm-1Heilex ringø5050*50*1.510794618200128ø7676*76*1.8759556318087ø100100*100*2.0559648185062The bulk density given here ... .5>7.0>6.0>8.0>10.0 50,76,100mm Plastic Heilex Ring