Grease Feeder, Capacity (Oz. ) 4 oz, Dia. (In. ) 3 1/4 in, Height (In. ) 7 1/8 in, 1/4 in Male NPT, Operating Temp. (F) -10 to 450, Spring Tension (PSI) 1 to 2, For Steel Mills, Foundries, Lumber Drying Kilns, Glass Plants and Metal Heating Treating Facilities, Includes Extra Light and Heavy Springs