What outer-diameter size of vacuum lines were used on the d-a fuel pump (47-55)?

I have two sets from used pumps that were installed by owners. They are had 1/4" outer diameter lines. Brass adapters are in the threaded pump-ports (the tube ends are compression/ferrule fittings).

Thanks,

Tim
1954Advance-Design.com
1954 3106 Carryall Suburban
1954 3104 5-window pickup w/Hydra-Matic
The 216 and early 235 engines are not "splash oilers" -- this is a splash oiler.