20ft combo office and storage container standard features:

• R-13 Insulation
• HVAC 
• Electrical package - (1) 4' LED Light, (2) Outlets, 2 Circuits Breaker Panel (125AMP)
• Dual pane windows
• Cargo door lock box
• Corrugated steel sides
• Two-way forklift pockets
• 1 ⅛ thick marine plywood floors
• Corner castings all corners (8 total)