Aluminium CO2 cylinders for aquarium use.
 
1 Litre. Height 32cm, recommeded up to 45cm Aqaurium
 
2 Litre. Heigth 35.5cm, recommended up to 90cm Aquarium
 
3 Litre. Height 48cm, recommended up to  120cm Aquarium
 
Bottles are empty when shipped but are full in store.