Black thermal sheath length 7.5 meters (25 f) with internal diameter adjustable from 6.3 mm (1/4 ") to 11 mm (7/16"). Designed to protect delicate cables from heat. Withstands up to 649 ° C (1200 ° F) with continuous heat, and up to 1093 ° C (2000 ° F) as a heat peak. Not inflammable. Resistant to water, fungi, oils and fuel.