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 257F / 125C ; Operating temperature range of -40C to 110C ; UL 224; .