what size is the lead hose on viair compressor 400c

i would like to order my compressor today but i want to order the fittings i need too i need to know the tread size on the lead hose so i know what size reducer to get for my tank?

what size are the pressure switches usually

I think it's 1/4". I don't know about the pressure switch because I have the adjustable one. Don't know if it's the same as the rest.

On My VIAIR its 1/4 NPT and my pressure switch is 1/8" npt

its 1/4" for sure.