AIRTY Aquarium Biochemical Sponge Filter with Fish Air Pump Tank Aquarium Filters Accessories Size: 15cm*14.5cm*4.5cm Height of sponge: 8cm Diameter of sponge: 4.5cm Hanging filters, adsorption tank wall, using the sponge as a senior environmental protection filter, air pump in conjunction with, to achieve the dual effect aeration and filtration of fruit Respectively, for 10-80cm aquarium.