20 litres of professional grade CO2 effect smoke liquid is manufactured from the finest grade materials. It is supplied in four 5 litre containers, the lid can be resealed so you do not have to use all at once. This smoke fluid is an excellent choice for all vertical machines and is ideal for stage, concert work and clubs. This liquid produces an intense smoke bursts that disappear rapidly so gives the effect of real CO2. This liquid can be used in any heater type smoke and fog machines.