System includes:

Aluminum cylinder w/CGA-870 toggle valve
Regulator with contents gauge, (0 to 15 LPM)
Standard mask and cannula
Padded cylinder bag
Duration chart, instructions
Specs:
Cylinder - 4 cu.ft./113 liters - 2216 PSI
8.4" x 3.21 diam. 1.6 lbs
Duration (10K ft.) @ 1.5 LPM = 75 min.