80 Cf Scuba Dive Tank Faber Blue Steel Hp 3442psi New The 80cf Faber Blue Steel FX Tank is an excellent high pressure steel tank. F-x Series is a DOT E-13488 specification, no overfilling is allowed. All F-X Series cylinders are oxygen cleaned and suitable for Nitrox use. Inlet Thread 3/4" - 14 NPSM. Specifications: Height 20.87"(w/o valve), Diameter 7.24", Weight 28.6lbs (w/o valve)