Aquarium siphon for any size of aquarium glassProduct Highlights:- Innovative auto siphon pump (Semi-automatic water changer)- On & off flow control wire- Integrated gravel / fish strainer- Easy to install and useProduct Specifications:Tube Length: 1.4MMaterial: PlasticUsage Instructions:1. Put the siphon pump into the fish bowl 2. Put the other end of the tube into a bucket, then start squeezing the bulb (Blue part)3. Reduce the water inlet height, thus you can remove the dirt from the bottom of your aquariumEasy solution of water transfer or during water change. Flexible standard tubing, operation/pump bulb and discharge hose.Flexible siphon pump helps preventing the small gravel and debris from going into the hose.