Dier Chemical packing ,good quality ,competitive price ,and best service .We will try our best to meet with your requests . Teller rosette ring is made up of 12 small rings, This product has low pressure, great energy and high efficiency of mass transfer . Different size are available. Material; PE,PP,PVC,CPVC,PVDF NameOuter Diameter (mm)Height surface area (m2/m3)Void volume 3/m3Heaping number ( ...