Description: Large Inlet Hole: The inlet hole area of this Aquarium Filters Intake Guard is six times the inner diameter of the hose, ensuring efficient water flow.Dispersed Water Flow: This Inlet Basket Mesh is designed to disperse water flow effectively, thereby reducing suction force for a smoother operation.Fish and Shrimp Safe: With its long, thin holes, this Intake Strainer Filters ensures that fish and shrimp are not sucked in, making it safe for use in aquariums or ponds. Material: The Intake strainer covers mesh made of PP, avoiding inhaling fish, invertebrates, fry and shrimp into the filters, and prevents inhalation large amounts of debris.Application: Suitable for tropical fish farms, fish tanks, aquariums, fish ponds, wastewater systems, water treatment industry, or other commercial industrial systems. Specification: Material:PP 12mm: for hard tubes with outer diameter of 13mm 16mm: for hard tubes with outer diameter of 17mm Size Chart: 12mm: 1.6cmx6.7cm/0.63inchx2.64inch16mm: 2cmx6.7cm/0.79inchx2.64inch Package Includes: 1 PieceAquarium Filters Mesh Note: Please allow slightly errors due to manual measurement and different monitors.