Marks on most surface. Contents: 3 black chisel point permanent markers. Versatile chisel tip marks with both broad and fine line widths. Quick-drying. Fade- and water-resistant ink. ACMI AP: Conforms to ASTM D-4236. www.sharpie.com. We would love to hear from you 1-800-346-3278. Experience More Sharpie: Ultra fine; twin tip; fine; retractable. Assembled in USA.