LegacyMarkers are made of high grade 24 gauge stainless steel and permanently marked with a CO2 Laser Fusion process that utilizes a product called CerMark.
CerMark is chemically resistant to solvents, acids bases, abrasion-resistant, UV, and moisture. The marking can withstand temperatures up to 1796ºF. The high-resolution marks are black to maintain contrast and scannability, perfect for QR codes. All in all, you needn't worry about the longevity of your LegacyMarker.