The Zoo Med Products Nano Dome Hold Down Kit is a compact bracket that keeps your Nano Dome securely fastened to the terrarium screen cover. This handy accessory eliminates the need for a hanging light fixture and makes it easy to move the cover without displacing the Dome. Features Securely attach Nano Dome to screen cover; Convenient spring-hook attachment; No additional hardware required; Allows easy removal of screen cover without displacing dome fixture.