... Material: PE,PP,Metal 2.Feature: good corrosion resistance high volume,less resistance Detailed IntroductionPall ring, Tellerette packing ring, ... ,PP+15% Fiber glass.There features such as high void ratio ,low pressure drop,low mass-transfer ... ,uniform gas-liquid contact ,small specific weight ,high mass transfer efficiency and so on .Technical data ... our website: Tellerette packing ring for size M