This Bottle can hold a maximum 1.1 kg of CO2 Gas and is ideally suited to the Mosquito Slayer PRO and Series 4 (Gas) and existing Master Units** **We recommend that users of early versions of the CO2 Traps (I.e "Master" traps) use this bottle after replacement of the Main Gas Hose on their Traps to allow for a reduction of Gas Flow. (Please contact Head office for details). Please note that these bottles can be purchased full or empty, but cannot be shipped as air freight when full. PRICE SHOWN INCLUDES CO2 GAS - Nominal Gas weight is 1.1Kg- Shipping extra Gas Bottle shipping is quoted separately - Please contact Mosquito Trap for Shipping Quote