ARMSTRONG Circulator Pump, Astro 2 Series, Model: Astro 250ci, 0 to 64 gpm Flow Rate, 31 ft Maximum Head, 117 W, 115 V, 0.98 A, 60 Hz, 150 psi Maximum Pressure, 3400 rpm Motor Speed Rating, 1/20 hp, 1/2 in Connection, 2-Bolt Flanged Connection, 1 ph Phase, In-Line Mounting, 230 deg F, Iron, 6.38 in H x 6 in W, Additional Information: Noryl Impeller Material