Features: Brand new and high quality Keep Your Fish Cool: As long as temperature arrives 30℃, this aquarium cooling fan can lower your tanks temperature by 3-4 degrees, ensuring your fish stay happy and healthy High-Quality Material: Made of durable aluminum-alloy, this aquarium fan can stand the wear and tear of everyday use Perfect for Fish Enthusiasts: Whether you're a professional or just start out, this fan is perfect for anyone who wants to keep their fish cool and comfortable Great for Hot Summer: Use it during hot summer when temperatures rise and your fish need relief from the heat Easy to Use: Simply attach the fan to the side of your tanks and plugs in, it is that easy! It will not take much space and not interfere with the looks of your aquarium Specifications: Material: Aluminum-Alloy Color: Black Style: 2 Heads/3-Heads/4-Heads Size (Approx.): 2 Heads-210x100mm/8.2x3.9in 3 Heads-298x100mm/11.7x3.9in 4 Heads-385x100mm/15.1x3.9in Weight(Approx.): 2 Heads-520g 3 Heads-600g 4 Heads-710g Package Includes: 1 Set Aquarium Cooking Fan (2 Heads/3-Heads/4-Heads) note: 1.Please allow 0-1cm error due to manual measurement. pls make sure you do not mind before you bid. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item. Thanks!