These are the replacement c02 cylinders used in the Sparq S4 sparkling water system. 

each containing 2.2L of CO₂ Food grade Carbon Dioxide, Non Flammable, Non toxic gas. Class 2.2

Each canister with gas is $140.00. (canisters are disposable)

TWIN set of 2 x c02 cylinders $250.00

The CO2 canister of SPARQ S4 lasts for 9 to 12 months under normal household use requirements.

Canisters are pressurised and must be handled with care.

Each canister is 321mm high x 105mm wide and weighs 3.20kgs and are non refillable.

NOTE: Transport under dangerous goods (pressurised cylinders) requires a shipping quote. Cannot be posted. Must travel via courier service (not Australia post and no air service) Delivery area is limited.

note: Regulator displayed in the second image is not supplied.

this regulator is supplied with the initial purchase of the sparq water carbonation and filtering unit.

This regulator can be purchased separately