PART # 3378134 GENUINE FACTORY OEM ORIGINAL DISHWASER RINSE AID CAP FOR WHIRLPOOL. KITCHENAID. KENMO GENUINE FACTORY OEM ORIGINAL FOR PROPER FIT, EASY INSTALLATION AND RELIABILITY You do not need an o-ring for this new style cap. Part Number 3378134 (AP3044709) replaces 3369200, 3369155, 3369512, 524580, AH343987, EA343987, PS343987