"9CACTUS TRADE MARK SELECTIVE PERMEATION MEMBRANE AIR DEHYDRATOR MODULE; MAX OPERATING TEMP 150DEG F; EACH END OF 4"" DIA CYLINDER HAS A 0.75"" 150LBS RFSWF FLANGE; CYLINDER HAS TWO 0.5"" DIA VENTS AND TWO 10"" WIDE MOUNTING BRACKETS WITH 17/32"" DIA HOLES"