CO2 Diffuser Set 20g Cartridge CO2 Supply Set 45g Cartridge CO2 Supply Set 95g CO2 Disposable Supply Set - Easy Start Up 95g CO2 Disposable Supply Set - Basic 95g CO2 Disposable Supply Set - Pressure Reduced 95g CO2 Disposable Supply Set - Advance 95g CO2 Disposable Supply Set - Premium 95g CO2 Disposable Supply Set - Professional