Precision Stainless 48 x 48 inch 1000 liter pressure vessel. National Board certification maximum working pressure is 75.8 PSIG at 300 degrees farenheit. The shell thickness is .187 inches, head thickness is .250 inches with the head dish radius being 42 inches. This vessel has a 12 inch manway and an 8 inch observation/sample port in the top head along with 3-4 inch, 2-1 1/2 inch, and 2- 1/2 inch victaulic fittings. There is 1-4inch and 1-1/4 inch victaulic fitting on the bottom sidesheet and 1-1 inch on the bottom head. Overall height is 94 inches.