The XPF-1/4-100-BLK is a flame-retardant expandable polyester monofilament sleeving designed to encapsulate and protect cable bundles and wire assemblies. It features a nominal inner diameter of 0.250 inches (6.35 mm) and accommodates bundle sizes ranging from 0.125 to 0.375 inches (3.18 to 9.53 mm), adjusting to irregular surfaces and contours with minimal bulk and weight. The sleeving is rated for an operating temperature range of -94°F to 250°F (-70°C to 125°C), meets VW-1 flammability requirements, and is UL-listed (File Number E142828). With an approximate weight of 0.25 lbs/ft and standard spool lengths of 100 or 1000 feet, this product provides abrasion resistance and protection for wire harnesses in industrial, automotive, and aerospace applications where flame retardancy is required.