Features: Shrimp Protection Filter The stainless steel basket protects shrimp and juvenile fish from being sucked into the filter. High Quality Made of high quality stainless steel, it is non-toxic, eco-friendly, strong, durable and has a long service life. Easy to Clean When cleaning is required, simply brush away accumulated dirt from the filter guard with your hand or a soft brush such as a toothbrush. p> Multipurpose Ideal for tropical fish farms, koi ponds, sewage systems, cooling towers and other commercial and industrial systems. Specifications: Material: Stainless Steel Size: 8.5 x 3 x 1.6cm / 3.35 x 1.18 x 0.63in Inner diameter: 16mm Color: silver < p>Package Includes: 2 x Aquarium Filter Note: 1. Please allow 0-1cm error due to manual measurement. Thank you for your understanding. 2.The monitors are not calibrated the same. The item color displayed in the photos may be showing slightly different from the real object. Please take the real one as the standard. Good choice for your aquarium percolator. Ideal for bio balls, activated carbon, ceramics and ammonia removers. Captures particles and debris, improves biological filtration and prevents small and small residents from entering the filter. These inlet strainer covers slide easily over the inlet pipe and prevent the fish from being inside. The mesh size is very small so that the small shrimp and fish are not sucked into the filter.