Perfect for marking Windshields!! Create your own attention grabbing messages with these easy-to-use Wide Tip Paint Markers. Acid Free, water based, and fade proof ink works with most surfaces including paper, glass, metal, plastic, rubber, & wood and will wash off easily from non-porous surfaces, including glass. Shake well with cap on before use. Depress the tip several times to get sufficient ink flow. Bright vivid colors!