This set of high-quality rubber O-rings is perfect for ensuring a reliable seal in various plumbing applications. Measuring 3/8 inch in outer diameter, 1/4 inch in inner diameter, and 1/16 inch in thickness, these O-rings are designed to prevent leaks and maintain a secure connection. They come in a convenient pack of 20, making them an ideal choice for both professionals and DIY enthusiasts looking to stock up on essential plumbing components.