SharkBite 4"x8" Pex Barbed Copper Stubout Elbow. This elbow is designed to make a 90-degree turn inside walls to the outside for connecting to plumbing fixtures. It features a 1/2" Pex barbed end for connecting to 1/2" Pex pipe using a 1/2" Cinch clamp or 1/2" Copper crimp ring. The copper stubout end can be cut off to secure a shut-off valve using a push-on, compression connection, or sweat copper shut-off valve. This elbow is made of durable copper construction and is lead-free compliant. It has a maximum working pressure of 200 psi and can be used with clamp or crimp-ring connection methods.