Dahl 10PK 1-1/4in copper test cap is a copper fitting designed for temporary closure and pressure testing of copper tubing systems. The caps are designed for sweat/solder installation, allowing for quick seals of open copper tube ends during system testing or installation. • Convenient 10PK quantity. • Durable copper construction for dependable service. • Provides a secure temporary seal for copper tube systems. • Easy solder installation for plumbing applications. • Suitable for residential, commercial, and industrial plumbing projects.