Bullet_point: ['Markers are designed for wire identification and insulation purposes, ideal for use in the aerospace industry, specifically in planes powered by hydrogen fuel cells', 'Operating temperature range is -55°c to +135°c (-67°f to 275°f)', 'The b-344 permasleeve polyolefin material is suitable for use in applications that require greater resistance to harsh chemicals such as fuel and high power cleaning solvents'] (Page 1)