Use your magnetic tow lights on glass or fiberglass surfaces with these SteelPlate Suction Cups. Industrial grade suction cups provide a strong surface onwhich to mount magnetic tow lights. Once suction cups are applied to thevehicle, simply stick your magnetic tow lights to the steel plates on top.Sold in pairs. Versatile: Easily adhere to glass or fiberglass Cost Effective: Use the magnetic tow lights you already have Suction Cup Measures 4.5″ in diameter Magnetic Surface measure 3″ x 4″ x 0.25″