- Do-It-Yourself charge and measure like the pros. - Easy to Use - Helps prevent over or under charging and unnecessary venting of R-134a. - Includes24" Blue Low-side hose, 24" Red High-side hose, 24" Yellow Charging hose, High and Low side connectors, R-134a Can Tap. - Complete instructions included. - For use with R134a Acme threaded can only.