Increase Space: Our storage rack sit perfectly in place the window sill is widening, the items are placed smoothly Acrylic Material: The clear board is made of acrylic material Install: According to the installation instructions, quick installation. Non-hole installation ensures that the wall is intact Cleaning: This window shelf board waterproof, not afraid of scratching and wear, easy to wipe clean using a damp cloth Enhanced Storage: The Window Sill Extender Plate offers a practical solution for creating additional storage space in your kitchen, office, or bathroom