Desk-style permanent markers in this value pack deliver bold, low-odor ink that provides high visibility from a distance on most surfaces including cardboard, metal and plastic. Permanent ink is quick-drying, water-resistant and rub-resistant. 3/16" durable chisel tip marks in a variety of line widths. Large size has a generous ink supply for an extra-long life. Markers are ACMI certified to meet Federal standards of nontoxicity. They are safe for office, school or home and conform to ASTMD4236.