ITEM NAME:Aquarium Fish Tank Adsorption / Filtration Media Activated Carbon Purification d Descriptio n Description: Material: charcoal Color: picture color Dimensions: 0.4cm in diameter and 1-4cm in length (different lengths) Features: Role: adsorption / filtration 1. Water treatment (industrial wastewater / domestic sewage) 2. Air purification (adsorption of exhaust gas / impurities) 3. Deodorization, removal of heavy metals in water 4. Liquid discoloration, gas separation Package included: 200g* activated carbon Note: 1.As different computers display colors differently, the color of the actual item may vary slightly from the above images. 2.Please allow 1-3 CM differs due to manual measurement. Thanks for your understanding. Whatever the ending's perfect or not, you can't disappear from my world Activated carbon Aquarium Fish Tank Water Air Filter Media.Air purification (adsorption of exhaust gas / impurities). Role: adsorption / filtration. Material: charcoal. We want to make sure you are happy with our item. Goods without RMA number will NOT be accepted.