Create beautiful windows with The Window Wonder (TM) a snap-together window frame for most miniature Christmas light sets. The Window Wonder (TM) is a snap-together plastic frame that you size to your windows. Notches within the frame are designed to hold miniature Christmas lights. Most sizes any length of string. The frame is secured between the window sill and top window jamb. With The Window Wonder there are no staples tacks or tape to mar your woodwork. Lights are precisely spaced and parallel visible indoors and out. Your windows are holiday gorgeous the envy of the neighborhood. With your order you'll have everything you need to transform your home into a lighted wonderland. Be the first person in your area to discover the wonder of The Window Wonder (TM) The Window Wonder (TM) allows you to have that professional look that you can do yourself from the inside. All you do is put together the pieces that will be custom fit for your windows and pop in the lights. Don't ruin your windows ever again with messy glue staples tacks or tape. Included with each set is:(4) 4-ft. plastic rods (16 linear feet) (8) vinyl end caps (2) connectors to extend length PLEASE NOTE: The Window Wonder will work with incandescent lights only; will not work with LED lights.