Plastic cascad mini ring 1.ISO9001:2000;SGS 2.Size: 16mm, 25mm, 38mm, ... 50mm, 76mm 3.Material: PE,PP,RPP,PVC,CPVC,PVDF Plastic ... cascad mini rings belong to Plastic random tower packing,has a wide rang ... of many fileds. Cascade Mini Ring are widely used ...