?Protect shrimp and fish? The mesh of the filter cover is small, which can avoid sucking on small shrimp and fish. ?Prevent clogging? Can prevent suction of large debris and block the filter system. ?Application? Suitable for use in aquarium and aquarium, protecting shrimp and small fish safely. ?High Quality? Our aquarium filter net is made of high quality stainless steel, which is sturdy and durable. ?Easy to install? Easy to install and easy to use. Specifications Condition: 100% brand new material: stainless steel Size: Small, Large (optional) Small: approx. 6.8 * 2.5cm / 2.7 * 1in; inner diameter: 12mm, suitable for waterfall filter Large: Approx. 8.5 * 3cm / 3.4 * 1.2in; inner diameter: 16mm, suitable for connecting pipe with 17mm outer diameter Weight: approx. 11-16g Package included: 1 * aquarium filter box Notice: 1. Please allow 0-1 inch error due to manual measurement. Thank you for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may