Uponor ProPEX® lead-free (LF) copper stub ells provide a 90 deg transition from Uponor AquaPEX® tubing to copper.1 Copper stub ells are comprised of 1/2, 3/4 or 1 in type L copper pipe with an Uponor ProPEX® fitting on one end and the other end spun closed. Uponor Stub Elbow, Fitting/Connector Type: 90 deg Elbow, 3/4 in Nominal, PEX Brass x C, 8 in Length, 200 psi, Copper, 200 deg F, 5 in W, Domestic, Domestic