ST0720400R3C - 4" Carbon Steel Raised Face Eaton Model 72 Simplex Basket StrainerThis is a 4" carbon steel Eaton model 72 simplex basket strainer Eaton part number ST0720400R3C. The unusually large basket capacity paired with an easy open cover, no bypass design, and large free straining area have made the model 72 THE industry standard for over 70 years. Each unit is tested at 150% of its maximum rated pressure before it gets to you. For a top performing strainer you can trust choose the Eaton 72.