The Paper Mate Feathers/Markers Double Tip Thick 15 Markers in 30 assorted colors are auto, window, any use markers made of plastic. With a double tip design, these markers provide a bold and thick line for clear and vibrant writing on various surfaces. Perfect for use in business and industrial settings, these markers are ideal for marking and labeling materials in a variety of colors for easy identification and organization. Item ref. AMAZ