This flat washer is designed to use with EQ-Series commercial plastic pump models EQW 300, EQWK 300, EQW 500, EQWK 500, EQ500, EQK500, EQ750, EQK750, EQ1000, EQK1000, EQK1500. Measures 11/16-inch inside diameter by 1-5/16-inch outside diameter by 0.078-inch thick.








