The Aqualight Adjustable Mounting Legs allows the fixture to be positioned at a 90 degree angle for easy access to the aquarium. For use with Coralife Aqualight and Freshwater Aqualight fixtures. Does not work with the newer version of Coralife Lunar Aqualights (the newer version has one fan instead of two and has hexagonal lunar lights). USE WITH GLASS TANKS ONLY (the lip on acrylic tanks prevents the attachment of the holding screw). Black color.