Prevents harmful debris from entering your pump, reducing pump maintenance. The heavy duty netting is designed to be both tear and blockage resistant. Perfect product for use in canister filtration systems, aquariums, pond filters, to hold media for ensure a clean aquariumIndustrial grade mesh material, triple stitched, wear resistant, protects against harmful organic substances that cause wear and tear. Heavy duty mesh is designed to resist both tearing and blockages. Convenient drawstring to secure the pump in the bag. Package contents: 2 filter bags. Dimensions: approx. 31 x 41 cm (L x W) Made of mesh fabric, durable and strong for use. Quality mesh industrial, triple stitched, durable mesh. The robust mesh is both tear and blockage resistant. Convenient drawstring to secure the pump in the bag. The pump mesh bag is easy to clean or replace. The pump cover prevents debris from entering, increasing the life of the pump. Dimensions are suitable for most pump sizes. Protects the pump from harmful deposits. Specifications: Product name: filter bag. Color: black p> Material: mesh Dimensions: approximately 31 x 41 cm (L x W). Contents: 2 filter bags. Note: Connection: 1 cm = 10 mm. 1 . Due to the difference in screen setting and light, the color may be slightly different from the photo. 2. Please allow 0.5-2 cm error due to manual measurement.