Aquarium equipment -Aquarium filter cartridge Replacement filters Highlights generic brand Aquarium filter cartridge Replacement filters Description: Easy to install and easily changed cartridge. Keeps aquarium fish tank clean. Filled with powerful activated carbon. Remove trash particles, odors, discoloration and other harmful toxic substances. Suitable for aquarium low water level filter. Suitable for fresh and marine water. Specification: Material: Cotton, Activated Carbon Size (LxWxH): Approx. 5.5x1x10 cm / 2.17x0.39x3.94 inch Package includes: A set of 5pcs carbon filters Note: Since the above size is measured by hand, the size of the actual item might be slightly different of the above size. Due to lighting effects, monitor settings etc. There could be a slight difference in the color tone of the pictures and the actual item.