Heavy-duty marker is perfect for writing on steel, making it great for a variety of industrial uses, Won"t smear on greasy surfaces, Rust resistant ink won"t bleed, Removable with liquid alkali detergent (ph 8-10), Heavy-duty acrylic nib, Won"t smear on greasy surfaces, Ideal for marking on steel, Rust-resistant, won"t bleed, Removable with liquid alkali detergent, SKU: AZERTY1125