1/2" x Closed 4" x 8" Pex Barbed Copper Stubout Elbow, Without Nailing Plate, Used To Make 90 Degree Turn Inside Walls To Outside For Connection To Plumbing Fixtures, 1/2" Pex Barbed End For Connection To 1/2" Pex Pipe Using 1/2" Cinch Clamp Or 1/2" Copper Crimp Ring, Copper Stubout End Is Then Cut Off To Allow Shut Off Valve To Be Secured To End Using Push On Shut Off Valve, Compression Connection Shut Off Valve Or Sweat Copper Shut Off Valve.