, Port Flange, Maximum Suspended Solids Diameter 1/4 Inch, Air OperatedPolypropyleneNonmetallic Air-Operated Double Diaphragm PumpsHousing MaterialsHighly resistant to many caustics and a wide variety of nonaggressive water-based liquids.Easily pump slurries, solvents, and high-viscosity liquids such as paints and waste oils.