High Quality Material: The aquarium filter is made of high quality stainless steel, which is non-toxic and odorless, compact, not easy to deform, not easy to rust, and durable. The filter sponges are made of high quality filter foam, are BPA free and safe for your fish. Practical aquarium accessory: Can be quickly and easily attached to the stem of the inlet pipe from the aquarium. Just cover it right at the water inlet of your filter. Prevent small fish or shrimp from being sucked into the filter. Effectiveness of protecting fish and shrimp: The mesh of the filter sleeve is very small, which can avoid sucking the small fish and shrimp and suck large debris into the filter system. Easy to Clean: When cleaning is needed, simply brush off accumulated dirt on the filter guard with the hand or a soft brush such as a toothbrush. Wide Application: Ideal for tropical fish farms, koi ponds, sewage systems, cooling towers and other commercial and industrial systems .