Complete tool kit includes 4 green rubber gaskets, 4 black rubber gaskets, 4 o-ring sealing rubber rings, and 4 brass valves.
Green rubber washers can be used to replace gaskets in R134A & R1234YF self sealing can taps and puncture sealing can taps.
Black rubber washers can be used to replace the gaskets in all ac hoses.
The large O-ring seal rubber rings replace the rubber rings in the R134a quick couplers and the small O-ring seal rubber rings replace the rubber rings in the R1234yf quick couplers.
Brass valves can be used to replace the thimbles in the bent cores inside all ac hoses.