1/2" CF Lead-free brass barb PEX insert x 3/8" O.D. compression straight stop. For cross-linked polyethylene (PEX) cinch/crimp system. For hot or cold water applications. Oval handle, chrome-plated lead-free brass cinch/crimp straight stop valve with 3/8" O.D. compression end for supply line hook-up. For use with stainless steel cinch clamps or copper crimp rings, not included. Chrome finished lead-free brass valve. NSF approved. Bagged. This product meets the new NSF/ANSI standard 14-2009 and ASTM F 1807-9SI standard for products intended for the transport of potable water, ANSI/NSF standard 61 Annex G for lead-free compliance, the wetted surface of this product contacted by consumable water contains less than 1/4 of 1% (0.25%) of lead by weight to meet AB1953 (California) and VT S152 (Vermont) low lead restrictions.