Rated for UL VW-1 flammability test specified by UL 224 standard, DWFR Heat Shrink Tubing features flame retardant polyolefin jacket and thermoplastic inner adhesive wall that provide electrical insulation and mechanical protection. When properly installed, tubing shrinks to create moisture-resistant seal. Available in 14 sizes from 3–52 mm ID, tubing offers heat shrink ratios of 3:1 or 4:1. All sizes provide full recovery at 125°C and can be used across operating temperatures of -40 to 110°C.