Adhesive Lined Heat Shrink Tubing (ALT) - 3/16" x 3" - 3-Pack - Black Package of 3 Black 3"(7.6cm) long sections with a 3/16"(4.8mm) diameter that shrinks to 1/16"(1.6mm) Wire Range: 20-12 AWG Features: Cross Linked polyolefin tubing is much stronger than PVC tubing and will not burn like PVC ; Heat activated adhesive lining provides impervious seal to salt water, oil, acids, and sunlight as well as providing strain relief ; Highest shrink ratio - shrinks to 1/3 original size ; Shrinks at 257°F / 125°C ; Operating temperature range of -40°C to 110°C ; UL 224; .