... ring ,with superior quality,competitive price and prompt delivery service. Plastic random packing include many kinds of rings,such as , plastic ladder ring ... ,plastic pall ring ,rectangle saddle ring,etc. Specification:NameNormalmmDiameter×Height×ThicknessmmSurface ... %Bulk densitykg/m3No.elementsper/m3Packing factorm-1Pall ringΦ2525×25×1.2213918548300285Φ3838×38×1 ...