AllPoints Foodservice Parts & Supplies 1781109 is a high-quality rubber washer designed for coffee machines. With an outer diameter of 5/8 inches and an inner diameter of 3/16 inches, this black rubber washer ensures a secure and leak-proof fit. It is ideal for maintaining optimal performance in your coffee equipment, providing durability and resistance to wear. Perfect for replacing worn-out washers, it helps extend the lifespan of your coffee machine and ensures consistent brewing quality.