4500 PSI DOT Cascade Cylinder Systems Set of 4 with Pigtail SetupDOT/ISO Storage Cylinders 4500Air Capacity 444 Cu. Ft. @ 4500 PSI,Water Volume 2680 In3 (1.55 Ft3 or 11.6 Gal)Specification DOT-E 9421-4500Dimensions 9 5/16 OD x 54 tall without valveWeight 144 Lbs, empty (180 Lbs full)Valve - CGA347 ValveTanks come with the whole pigtail setup of valves, gauges, and hoses. Please see pictures for details.These tanks are listed as a set of four. Listed as local pickup but If you can arrange shipping for all 4, please message me and we can discuss it. They are currently being stored in a two horse trailer that is clean and that trailer can sell with them for an additional $500. Please message with any questions.