High Quality Material: The filter sponges are made of high quality filter foam, BPA free and safe for your fish, without affecting the pH quality of the water, good for both freshwater and saltwater environments. Practical Aquarium Accessory: Can be quickly and easily attached to the aquarium intake tube stem, just cover directly onto 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: About 8cm high, 4cm diameter, 20mm inner diameter. Package Content: 10 PCS x Aquarium Pre-Filter Sponge Good Filter Effect Product Color: Black Sponge Inlet Filter These filter sponges can easily catch debris in the water, make the water cleaner, better for fish growth and create a more comfortable living environment for your pet. Sponge Inlet Filter High-quality material Range Premium foam combines with filters to prevent dirt from entering the filter cartridge, extending the useful life of the filter media, safe for water and fish. Sponge Inlet Filter Easy to Use 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 achieve a 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, without wasting resources. 10 x filter sponge 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 pool inlets to ensure clean and stable water quality; good for fresh and marine water.