NIBCO 1/2" Sweat/Solder Copper Tube Cap fits over the outside diameter of tubing, providing a secure and reliable cap for your copper pipes. This sweat/solder fitting is designed for use with Type K, L, or M copper tubes, making it a versatile choice for various plumbing applications. Its durable construction ensures a long-lasting seal, helping to prevent leaks and maintain system integrity. Model Number: