Colored PVC heat shrink tubing is great for general-purpose applications. Flame retardant. Continuous cooperation temperature: -30 Deg (degrees) C (Celsius)/ -22 Deg F (Fahrenheit). Shrink temperature: 110 Deg C/230 Deg F. Inside diameter before: 1/4-inch, after: 1/8-inch. Conductor gauge No. 20 to No. 12 AWG. 8-feet long.