Grease Feeder, Polycarbonate, Capacity (Oz. ) 6 oz, Dia. (In. ) 3 in, Height (In. ) 6 in, 1/8 in NPT, Operating Temp. (F) -10 to 250, Spring Tension (PSI) 1 to 2, For Corrosive Operating Conditions such as Chemical and Food Processing, Includes Corrosion Resistant Metal Base, Extra Light and Heavy Springs