The Veg Ledge Large is a lucite shelf that suction cups to any window or mirror. There are so many uses for the Veg Ledge! Use for growing any herbs plants or flowers in your window. Perfect shelf for any decorations like bowls teacups candles figurines or seasonal decor. Just adhere Veg-Ledge to a CLEAN WINDOW and start windowscaping! Sturdy lucite shelf will hold up to 12 lbs. Fits in between window mullions. Veg Legs also available for added support. (Sold separately). Aquaphoric planter sold separately. It is very important that the window is clean and dry before you adhere the Veg Ledge. The suction cups are high quality and will adhere extremely well but only to CLEAN smooth surfaces like glass or tile. Air leaking behind the suction cup is the only reason suction cups fail so it is imperative to clean surface. See Veg Ledge instructions. Veg Ledge Installation: Â Install only to smooth non-porous surfaces such as glass or tile. Â Suction cups adhere best with indoor air temperature between 40 and 95F. Â Make sure the suction cups and the surface are clean. Use cotton ball with alcohol to clean surface and suction cup and then dry with a paper towel. Â Slightly moisten suction cup. Â Adhere the Veg Ledge to the surface by pressing suction cups all the way down against the surface. Â To remove peel the edge of the suction cup off the surface to release the suction. Maintenance: Â Periodically burp suction cups by pressing down on them to remove any air that may have seeped in. Â Suction cups may get cloudy over time which will affect performance. Remove and clean with warm water use a mild dish detergent if needed. Wipe dry with a lint free paper towel or cloth.