Recyclable, single-use bottle filled with 1.2 kg CO2 CO2 bottle for tous CO2 kits. Supplies aquarium plants with carbon dioxide, their main nutrient. Easy installation: screw the regulator with female thread onto the male thread (M10x1) of the CO2 bottles... With rubber foot for stability. Total height with regulator fitted: 37 cm... Disposable, TÜV-approved, recyclable steel CO2 cylinder (M10x1 thread). As CO2 liquefies under pressure, CO2 cylinders must be used in a vertical position... Contents: single-use bottle filled with 1.2 kg CO2, dimensions: approx. 45 x 10 cm, M10x1 thread.