R1234YF Charging hose with R134a Can Tap with Gauge with plastic ends. This is an economy gauge set with plastic ends. Perfect for the folks that use it occasionally. This is perfect for adding sealants, oil charge, dye charges that have the R134a top on them to R1234YF systems. This item will NOT screw onto the top of a R1234YF can! The can tap is an R134a tap and the end of the hose is R1234YF. It will NOT work with valve style 134a cans.