Cup Waterer, big enough for sows, small enough for baby pigs (7" long, 5-1/2" wide, 2" deep). When sows push trip plate, they get clean, fresh water. Baby pigs learn to drink from the cup. Heart of this cup is Trojan's patented 393 valve. Trouble free, non-siphoning, saves water. Orifice sleeve inside filter controls high water pressure, delivers uniform water flow. Cast aluminum cup with epoxy finish is non-porous, easy to clean. No corners to catch & hold scum. Model 33.