Which type of tank must be used during the transfer of refrigerant? tanks marked dot 4ba tanks marked dot 9ac tanks marked dot 43b?

The type of tank that must be used during the transfer of refrigerant is THE TANK MARKED DOT4BA. This type of tank has been specifically designed for movement of refrigerant. During the process of transfer, it must be ensured that the cylinder is safely tied to an appropriate wheel device. All forms of contamination to the atmosphere should be avoided during the movement of the refrigerant. 

100%sorry if i’m wronghope this good luck: )