Type HIX heat shrink tubing in 4 foot lengths (about 120 cm). The shrink ratio is 2:1. Operating Temperature Range: -67F to +275F (-55C to +135C) degrees. Shrink Temperature: 121C/250F. Colors: Type 1, flame-retardant: Black, White, Green, Red, Blue, Yellow, Type 2, not flame-retardant: Clear.