1Made of high quality acrylic material, sturdy and beautiful, durable and long service life. 2It can effectively prevent the fish food from drifting around or flowing into the filter tank, thus causing waste of fish food. 3It can help develop the habit of fish, when people approached, reflexively swim towards the feeding ring and gather. 4Feeding tube height arbitrary adjustment, flexible installation, suitable for different tank water level. 5Plastic screws tighten, never rust, do not slip. Four specifications that give you more options. 6Product instructions: the product is fixed on the tank wall for use. It is suitable for the tank with no tension but only the tank wall. (feeding ring height is adjustable)