ARG-2500 Series 2-1/2" Raw Water Strainer Stainless Steel BasketFeatures:. Mounting System Allows Removal Without Tools. Bonding Connection Both Sides. O-Ring Seal All Joining Surfaces. Filter Basket Options. #304 SS (Standard). Monel. Non-Metallic. One-Piece Molded Sight Glass Eliminates Tie Rods and Gaskets. Improved Drain Plug. Non-Metallic Cap Magnifies Internal Viewing. NPT or BSPP Threaded Ports. Improved Basket Design. C84400 bronze head casting. UL Listed 255-D