✔Size: Small 10x10x5cm/Large 10x10x10cm. Note: Honeycomb activated carbon is made of mold and is fragile due to the porous honeycomb design. Therefore, when receiving the goods, there may be some missing corners or detachment on the edge, which is a normal phenomenon and does not affect the use function. If you have received a damaged product, please contact us and we will reissue it for you. ✔Super absorbent activated carbon block: solid content, no powder, no impurities, and will not cause black water. ✔Super filtration and absorption: Adopt honeycomb structure design to maximize the adsorption capacity. ✔Simple to use: Just wash it with soap and warm water, and put it back in the water tank. ✔Suitable: for pools, fish tanks, aquariums, create a clear and healthy water environment for fish tanks and aquariums.