Nissen LCBUM Low Chloride Metal Marker, 1/8" Tip, Blue (Pack of 12) Marks on rough, smooth, wet, oily or dry surfaces Marks withstand heat and weathering, they won't chip, peel, fade or rub-off Meets most specifications for stainless steel and nuclear components Independent Laboratory Certifications of Analysis are available and traceable to marker Blue bright, high-gloss color and 1/8" tip size