Designed for rigorous wire marking applications, PermaSleeve® Military Grade 3:1 Heat Shrink Labels (B-342)) labels combine speed, ease of use, and permanence to create high quality labeling. Specialized — Designed specifically for military, aerospace, defense and transit wire marking applications. Easily Identifiable — Crisp, clear surface offers maximum mark permanence and resistance to abrasion and fading. Efficient — 3:1 shrink ratio provides fast, easy installation and a tight fit around conductors. Durable — Self-extinguishing polyolefin material resistant to extreme temperatures, UV light, chemicals, fuel and oil. Certified — UL Recognized to UL 224, RoHS Compliant to 2011/65/EU (Pass 2015/863), SAE AS23053/5 (Class 4) & AS-5942, SAE AS-81531, MIL-STD-202. Convenient — Designed to work flawlessly with a separate ribbon for reliable, crisp printing. Ribbon compatibility is printer specific. Use M61-R4310, M61-R6610 ribbon with M610/M611/BMP61, and M7-R4300, M7-R6600 with M710/BMP71.. For material specific performance and properties, please refer to the Technical Data Sheet (TDS). A ribbon is required to print this material. Use Part Number M61-R6710-WT for the M610 / BMP61 / M611 Label Printers or M7-R6700-WT for the M710 / BMP71 Label Printers.