The Brady B-345 PermaSleeve Heat-Shrink Polyvinylidene Fluoride wire marker sleeves are specifically designed for high temperature and low vacuum outgassing applications. 2:1 heat shrinkable sleeves are fade-resistant and flame-retardant, and meet the requirements of NASA Vacuum Outgassing specification SP-R-0022A. Sleeves can be used in applications that require greater resistance to harsh chemicals such as fuels, lubricants and high power cleaning solvents. Meets SAE-AMS-DTL-23053/18 (Class 2), SAE-AS-81531, MIL-STD-202, Tested per ASTM E 162, ASTM E 662;RoHS Compliant;and UL Recognized.