Features: High Efficient Aquariums Filter: The fish tanks filter adopt fine efficient motor can perfect provide mechanical biofiltration and increase water quality and oxygen rate underwater, good for fish, shrimp, create healthy aquariums environment. Low Noise Filter: The aquariums filters 5 different optional power supply,work with low noise and strong oxygen supply, which can meet your various size fish tanks & household aquariums. Selected Material: The sponge filter use qualified ABS-material, nontoxic, tear & wear resistant, bring effectively filtration & aeration for your aquariums, fish tanks. Natural Water Circulation: The aquariums filter can produce powerful flowing as well as great oxygen produce, imitate stream water purification environment to produce natural underwater and good eco-environment for fishtanks, 3-in-1 multi-purpose can be use as oxygen diffuser, water pump, water filter, convenient and energy saving. Multiple Purification: The aquariums filter efficient transform organic impurities,nitrites and other harmful substances in the water into bacterias beneficial to the fish, improves the vitalities of the fish and reduces the illnesss. Package Includes: 1 x Aquariums Filter Specifications: Product Dimension: approx. 8W 15.5x7.3cm/6x2.87inch, 18W 24.5x7.3cm/9.64x2.87inch, 25W 32.5x7.3cm/12.79x2.87inch, 30W 40X7.3cm/15.75x2.87inch, 35W 48.5x7.3cm/19.09x2.87inch Material: ABS-Plastics Style Option: 8W/18W/25W/30W/35W note: Please allow 1-2cm errors due to manual measurement. Due to the differences between different monitors, the picture may not reflect the actual color of the item.