MMVI BIC-Mark-It Color Collection. These bold; long lasting permanent markers feature an acid free in that is great for glass; metal; foil; plastics; photos; coated papers and even oily and damp surfaces. These permanent markers come in a variety of colors and color combination packs and features ultra comfy rubber grips for comfort and control. This package contains four chisel tipped Markers: black; blue; green and red. Contents conform to ASTM D4236. Made in USA.