This carbon filters up to 2 liters of water. You should provide 20 to 30 g per liter of water. If you have water that is particularly strong in taste and smell (depending on where you live) we advise you to increase the quantity of charcoal. Characteristics: * Length: about 6-12 cm * Diameter: about 3 cm * Weight: 30-40 g NB: Please check the opening of your glass container. How to use: * Boil the charcoal for 15 minutes (then repeat this process every month). * Let it dry in the open air or in the sun. * Place it in a glass container, such as a carafe, and let it work ideally for 4 to 8 hours.