High quality material: The filter sponges are made from high quality filtration foam, BPA free and safe for your fish, without harming the pH quality of the water, good for outdoor environments. fresh water and salt water. Practical Aquarium Accessory: Can be quickly and easily attached to the aquarium inlet tube rod, just directly cover the water inlet of your filter. Prevent small fish or shrimp from being drawn into the filter. Effective Filter Protection: Can help trap particles and debris and extend the life of your filter media, provide efficient water flow with less clogging for long-lasting filtration. Size: approx. 8cm high, 4cm diameter, 20mm inner diameter. Package Contents: 10 aquarium pre-filter sponges. Good filter effect. Product color: black inlet filter sponge. These filter sponges can easily catch debris in the water, making the water cleaner, better for fish growth and creating a more comfortable living environment for your pet. . Drain Filter Sponge Inlet Premium Material Premium foam combines with filters to prevent dirt from entering the filter cartridge, extending the life of the useful, water-safe filter media and fish. Easy-to-handle sponge inlet filter This cylindrical filter sponge can be added to the aquarium quickly and easily, and provides efficient water flow to achieve long-term filtration and save time and effort to obtain good filtration effect. > Wide range of uses Sponge inlet filter Sponge inlet filter Sponge inlet filter This filter sponge is reusable; it can be removed and cleaned at any time to ensure the best filtering effect. It has good practicality, can be used for a long time, no waste of resources. 10 filter sponges to meet your daily replacement needs; Provides efficient water flow with less clogging for long-lasting filtration. These filter sponges are essential accessories for aquariums. They can also be used to filter swimming pool inlets to ensure clean and stable water quality; good for fresh and marine water.