NIBCO 1-1/4" Sweat/Solder Copper Tube Cap fits securely over the outside diameter of tubing, providing a reliable seal for your copper piping needs. This sweat/solder fitting is compatible with Type K, L, or M copper tubes, making it a versatile choice for various plumbing applications. Designed for ease of installation and durability, it ensures a strong, leak- connection that stands the test of time. Model Number: