Upper Compartment Capacity 83mL (2.8 fl oz) Ideal Contents Cash, House Keys, Salt Tablets, Patch Kit, CO2 Inflator Lower Compartment Capacity 600mL (20.3 fl oz) Ideal Contents: Inner Tube, 2 Tyre Levers, 2 CO2 canisters, CO2 Inflator, Multi-tool, Patch Kit