part 90409700 O-ring 55,56 x 3,53 (159) Interpump code 90409700 Details Interpump number90409700 DescriptionO-ring 55,56 x 3,53 (159) ItalianOR D.55,56X3,53 (159)Qty per pump1 Fits these pumps Interpump 58 E2 series 2 E2E2114E2E2811 Interpump 66 series 1 W1555