Includes: You will get 3 pieces aquarium filter, the stainless steel basket protects the shrimp and fry from being sucked into the filter.16mm inner diameter fits pipes with an outer diameter of about 17mm . Easy to clean: When cleaning is needed, simply brush accumulated debris off the filter guard with your hand or a soft brush such as a toothbrush. High quality : Made of high quality stainless steel, non-toxic and not easy to break, no problem with algae, non-toxic and harmless to fish, can be used for a long time. Prevent the clog: An attractive way to secure your aquarium shrimp. Can also prevent large debris from being sucked in and blocking the filter system. Protect shrimp and fish: Suitable for use in aquariums and aquariums, protecting shrimps and small fish safely. Easy to install and use.