This product adopts environmentally friendly high-density sponge filter and high-performance activated carbon as filter material. It can absorb dirt, quickly resolve fish manure, and eliminate odors in water. Pneumatic filter, can improve the quality of the water tank. Mini size, can be placed in the corner. Can increase the solubility of oxygen in water. Suitable for small size fish tanks. Material: Plastic Size: 8 x 8 x 8cm This mini filter cartridge is ideal for small aquariums, do not take and place, the effect is obvious. Easy to disassemble and easy to clean. No need for a separate power supply, it can be driven by a single-hole pump; triple filtration system - cotton filter, quartz sand, activated carbon. Connect to the air outlet of the pump and put it directly into the aquarium for use. Activated carbon is suitable for 10-60cm sinks, and large fish tank filters are only suitable for secondary use. Direct oxygenation triple-effect series filters: sand can block a lot of water, sponges can absorb residual substances, charcoal makes the water clearer Results in o clean water, creating a healthy growing environment for your fish. Package Contents: 2 x Fish Tank Activated Carbon Filters only the above package contents, excluding other products. Note: Light shooting and different monitors may cause the color of the item in the picture to be slightly different from the actual item. Measurement tolerance is +/- 1-3 cm.