Image Polypropylene Strainer Markets Agriculture & Forestry, Construction Product Options Part Number Thread Thread Size Material TSS20 NPT 1-1/2" Black Polypropylene with 30% Fiberglass TSS25 NPT 2" Black Polypropylene with 30% Fiberglass TSS35 NPT 3" Black Polypropylene with 30% Fiberglass TSS40 NPT 4" Black Polypropylene with 30% Fiberglass