Made of high quality material which is safe, odorless, non-toxic, environmental and durable. Connected to the air pump, can produce a lot of bubbles and improve the oxygen level of the water, realizing the double effect of oxygenation and biofiltration and keeping the water clean. Can absorb dirt, quickly resolve fish droppings, and remove odors in water. Comes with the filter material box to store more filter material, creating a more efficient filter effect. Low noise, and will not be blocked for long term use. Low noise, and will not be blocked for long term use. Product description Color: Qs-100a Specification: Condition: 100% brand new Item Type: Aquarium Sponge Filter Material: Plastic + sponge Color: Black + green Options: QS-100A Package Weight: Approx. 158-207g Application: aquarium, etc. Type: QS-100A Size: 150 * 135mm / 5.9 * 5.3inch Sponge Diameter: 48mm / 1.9inch Sponge height: 84mm / 3.3inch Filter material box size: 84mm / 3.3inch Suitable tank size: 0026 lt; 60cm /