These reusable mesh filter bags are good for holding various filtration media, such as activated carbon, to improve water quality. The fine mesh design effectively traps debris while allowing water to circulate freely. Suitable for freshwater and saltwater aquariums, they help create a balanced ecosystem for aquatic. Features -Color:White -Material:Polyester -Size:20.00X14.00X0.50cm/7.86X5.50X0.20in -Note:There are dimensional , with a deviation range of 1 - 2 cm. -Easy maintenance: the zipper aquarium media bag simplifies the process of changing filter media, making maintenance tasks quicker and efficient -Improved water quality: designed to fit multiple aquarium types, these aquarium media bags help improve water clarity, promoting a healthier environment -Longterm material: constructed from good polyester, these filter bags are built to last, minimizing the need for frequent replacements -High efficiency filtration: the mesh design effectively captures impurities, maintaining the high performance of your filtration system -Adaptable to various media: these mesh filter bags are compatible with a wide range of filter media, meeting diverse purification requirements Package list: 24 tank filter bags