Features: The anti-spill filter bag can improve the water environment by trapping food residue, fish feces, rotting plants, dust and more. This filter bag can be a useful gift for family, friends or relatives who want to protect their fish tank. Product Structure: Fine bristles Highly permeable Easy to clean Scrubbing won't break it. Specifications: Material:Polyester Color: White Size: Anti-overflow filter bag: approx. 18 x 35 cm / 7 x 14 inches Package Includes. 2 x overflow filter bags Note: Please allow a slight error in size for manual measurement. Manual measurement, please allow a slight error in size. Usage: The first time you use it, wash it with water and then tie it to the bottom filter tank or filter outlet for regular replacement and cleaning.