ST0720250T4C - 2-1/2" Cast Iron NPT Eaton Model 72 Straight Through Simplex Basket StrainerFor heavy duty simplex strainer jobs, the Eaton model 72 is what you need. The industry standard for decades, the model 72 features a large basket capacity, an easy to open no tools cover, and precicion machined basket seats. This particular model is a 2 1 2" cast iron strainer with threaded ends on each end of the straight through design.