PawHut 55W 15.8 Gallon Hydroponic Fish Pond Magnetic Air Diffusion Pump Works perfect for aquariums, fish ponds or hydroponic farms Includes six outlet air divider Electromagnetic motor produces 13.2 gallons of compressed gas Cylinder stator and piston designed with SF-1 materials for enhanced durability Overall: 7"L x 4"W x 4.5"H