Permanently mark wires and cables with high-performance PermaSleeve® Military Grade 3:1 Heat Shrink Labels (B-342). 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 tempera