This product is a set of two brass faucet seats with a 9/16"- 27 thread size, designed for plumbing repair and maintenance tasks. These durable seats are suitable for use in various plumbing fixtures and provide a secure fit to ensure a leak-proof connection. Whether you are fixing a leaky faucet or upgrading your home plumbing system, these brass seats offer a reliable and long-lasting solution. Free shipping to the lower 48.