Markal B-Paintstik Solid Paint Ambient Surface Marker, 11/16" Diameter, 4-3/4" Length, Red (Pack of 12) Combines long-lasting durability of paint with the ease-of-use of a crayon Ideal for quality control, parts assembly, color coding, defect identification and general marking Marks on smooth, rough, rusty or dirty surfaces For use on metal, wood, plastic, concrete, rubber, glass, cardboard and paper Lead-free, non-toxic; standard Paintstik (11/16") uses #101 and #102 holder Marking range: -50 degree F to 150 degree F (-46 degree C to 66 degree C)