Advance Tabco K-67F Replacement Fiber & Rubber Washers are essential components designed to mount under sink bowls, specifically for all 3-1/2 inch diameter drains, including models K-5, K-6, K-15, K-16, K-26, and K-67. These washers provide a reliable and secure fit, ensuring stability and durability for various sink installations. Made from a combination of fiber and rubber materials, these washers offer a unique balance of flexibility and strength, making them suitable for diverse applications in commercial and residential settings. The blend of fiber and rubber materials provides an effective seal that helps prevent leaks and maintain efficiency in plumbing systems. These washers cater to different segments within the plumbing and installation industry by ensuring compatibility with multiple drain sizes and configurations. Their robust construction supports long-lasting performance, making them a valuable component for professionals seeking dependable solutions for sink installations. Advance Tabcos commitment to quality craftsmanship is evident in the K-67F washers, which serve as a crucial accessory for ensuring optimal functionality in both new installations and replacements. These washers stand out as a practical choice for those in need of a reliable mounting solution for under-sink bowl configurations.