Washers are one of the simplest, yet most engineered, precise, and useful seal designs ever developed. Washers are available in various metric and inch standard sizes. Sizes are specified by the inside diameter and the cross section diameter (thickness). Danco washers will repair your leaky faucet and prevent future leaks. Faucets usually have one or more washers to prevent water from leaking out around the spout. Danco washers are high abrasive resistant and temperature resistant. These tough and pliable Buna-Nitrile Rubber (NBR) Washers will help provide long-term use for your plumbing needs. Danco washers are perfect for the everyday DIYer or the Plumbing Professional.