The AllPoints Foodservice Parts & Supplies 321420 O-ring is designed specifically for dishwashers, ensuring optimal performance of the wash arm. With an outer diameter of 2 inches and an inner diameter of 1-9/16 inches, this durable black rubber O-ring provides a reliable seal to prevent leaks and maintain efficiency. Its robust construction ensures longevity, making it an essential component for maintaining your dishwasher's functionality.