Used, works perfect.  Removed from mini-mega yacht when owner upgraded.

Has some light corrosion , see photos. 

Great deal for less than 1/2 price of new.  Compare to new at West Marine for $184.99 

Specs:

Two top-reading 300psi gauges. 

Select tank with manual switch. 

Inlets are 1/4" female inverted flare to accept 1/4" male inverted flare pigtail hoses.   Pigtail hoses not included.

Regulator outlet is 3/8" female NPT on low-pressure side.