Western Enterprises Brass Cylinder Adaptors Use a brass cylinder adaptor to connect a regulator to a cylinder or other equipment when different CGA threads on the mating parts make a direct connection impossible. Adaptors should not be used as permanent installations. . . Pack of 1 WARNING: This product can expose you to Lead, a chemical known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov - Lead