Your Hit air airbag vest may save your life in case of a fall. Make sure you always use the right type of Hit air canister in your vest. 
 
The 48cc Hit-Air canister is suitable for the Hit-Air SV-2 and LV models.
The 50cc Hit-Air canister is suitable for the Hit-Air SKV model.
 
Please read the manufacturer's user guide when changing canisters.