Designed for marking red-hot surfaces from 400°F to 1600°F (204°C to 871°C), the Heat Stik 400F-1600F hot surface solid paint marker withstands the rigors of steel production. Available in 6 bold colors, the durable weather- and fade-resistant marks will not run, char, flow, discolor, peel or crack. Ideal for marking billets, coils, bars, forgings and plates. Standard size sold in in case of 144.