Double diaphragm air driven transfer pump; Flow rates to 7 GPM; Pressures to 120 PSI; Self priming to 15'; Patented shuttle valve eliminates stalling; Constructed of corrosion resistant materials to handle a variety of chemicals; Diaphragms and check valves are Santoprene; Gas inlet & outlet are 1/4"; Product inlet & outlet are 1/2" or 3/8"