The SharkBite 23102CP25 Copper Crimp Rings are a high-quality plumbing fitting designed for use with 1/2" inch PEX pipes. Made in the United States, these SharkBite rings offer reliable and secure connections for your plumbing needs. The pack of 25 ensures you have plenty on hand for various projects, and the SharkBite brand reputation guarantees durability and efficiency in your plumbing installations.