5/8″x 1/2″ Brass Reduce Compression Union

5/8″x 1/2″ Compression Union with Nuts & Ferrules Outside Diameter Tube Size A simple way to repair or connect copper, aluminum and thin wall tubing. No soldering required. Warning: This product can expose you to chemicals, including lead, which is known to the State of California to cause cancer and birth defects or other reproductive harm.