Metal single way air valve plastic sucker clip aquarium accessories kit is perfect for hobbyists who appreciate good quality and simple design. This kit includes one each of the following: the metal Valencia suckerclips, a rubber adaptor and a screwdriver. The metal Valencia suckerclips are precision made and are designed to fit most aquariums. The Rubber adaptor is a soft and flexible material that will fit most standard aquarium manifolds. The screwdriver is necessary for tightening or loosening the suckerclips. This metal Valencia suckerclips aquarium accessories kit is a great way to add extra features to your aquarium, such asipple detection, and more.