Univen mixer planetary shaft O-ring seal, package of three. This O-ring fits on the main center planetary shaft of the mixer and seals the planetary from leaking grease. Compatible with many KitchenAid 4.5 quart and 5 quart Classic, Ultrapower, Heavy Duty, Professional and Artisan models. Compatible with many KitchenAid mixer models such as K45, K5, KSM5, KSM75, KSM95, KSM100, KSM150, KSM152 and 5KPM50. Also compatible with variants of these models which have additional numbers and letters before or after the model number such as 5K45SSPWH0. Compatible with KitchenAid part numbers WP67500-55, 4159817 and 67500-55. Quality part by Univen, a family owned American business.