Used 70 gallon STAINLESS STEEL PRESSURE TANK by Thermo Scientific, HyClone Smartainer II PDS, Part no. SV50154-03. Rated 8 psi. 23 inch inside diameter x 38 inch with dished bottom & dished lid. Polished 304 sanitary stainless steel. 17 inch diameter hinged lid with tri-clamp 1.5 inch, 2 inch, and 1/2 inch top inlets. Has 1.5 inch bottom center tri-clamp outlet. Has threaded NPT 1/4 inch top fitting Also a 3/4 inch NPT top fitting w/relief valve and quick connect air line fitting. On cart, overall 26 x 26 x 65 inch tall to top of fittings.