Robinair's No. 12458 Process Tube Adapter Kit provides the fastest and easiest means for connecting charging lines to process tubes for evacuating and recharging a system. Tool is designed to ensure an absolute seal between the tubing and the charging hose. Eliminates the need for flaring and the possibility of tubing chips getting into the system preventing possible system damage. For use with 3/16", 1/4", 5/16", and 3/8" copper tubing. Blow molded storage case keeps kit components contained and organized when not in use.