Fdit is a selfless and careful houseware craftsman, he devotes himself to provide the top-notch home-kitchen equipments to the common folk. We take each order seriously while our customers choose our product, because it is about your family's health Condition:100% Brand New Material: Plastic + filter Cotton Color: As Pictures Shown Type: XY-2880, XY-2881, XY-2882, XY-2883, XY-2885(Optional) XY-2880 fit fish : 80L XY-2881 fit fish : 100L XY-2882 fit fish : 200L XY-2883 fit fish : 250L XY-2885 fit fish : 350L Weight: Approx.168g~439g/5.9oz~15.5oz Instruction: 1. This product needs to be worked with air pump(the air pump should be 2W). 2. The air pump should be placed at the top of the aquarium to prevent backflow to the air pump due to power outage,Pls Soaking 5 minutes in the water of the aquarium before use it's good for the Nitrifying forming colony rinse sponge. 3. Rinse your sponge and use aquarium water. Don't use hot water. Package list: 1 * Aquarium Filter(Included filter cotton) 2 * Suckers Note: 1. Please allow 0~1 inch error due to manual measurement. Thanks for your understanding. 2. Monitors are not calibrated same, item color displayed in photos may be showing slightly different from the real object. Please take the real one as standard.