Cast aluminum, blue, non-porous 7"L x 5 1/2"W x 1 1/2"D for watering all swine. Uses a trouble free, non-siphoning patented 393 valve. Stainless steel trip plate is pressured by swine to fill cup. Orifice sleeve inside the filter controls high & low water pressure for uniform water flow. Holds up to 2 cups.