【Protect shrimp and fish】The mesh of the filter cover is small, which can avoid sucking small shrimp and fish. 【Prevent clogging】 Can prevent the suction of large dirt and block the filter system. 【Application】Suitable for use in aquariums and aquariums, safely protect shrimp and small fish. 【High Quality】Our aquarium filter mesh 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) < br /> Small: about 6.8 * 2.5 cm / 2.7 * 1 inch; Inner diameter: 12mm, suitable for waterfall filter. Large: about 8.5 * 3 cm / 3.4 * 1.2 inch; Inner diameter: 16 mm, suitable for connecting pipes with an outer diameter of 17 mm Weight approx. 11-16 g Scope of delivery: 1 * aquarium filter box Note: 1. Please allow 0-1 inch error due to manual measurement. Thanks for understanding. 2. Monitors are not calibrated same, item color displayed in