Ancor 302148 Heat Shrink Tubing in black is a top - notch choice. It comes in a 1 - piece package with a 3/16 in (4.8 mm) diameter and 48 in (122 cm) length, shrinking down to 1/16 in (1.6 mm). Made of cross - linked polyolefin, it's stronger than PVC and won't burn like PVC. The heat - activated adhesive lining offers an impervious seal against salt water, oil, acids, and sunlight, and also provides strain relief. It has a high shrink ratio, shrinking to 1/3 of its original size at 257 deg F / 125 deg C. The operating temperature ranges from - 40 deg C to 110 deg C and it's UL 224 certified. Each package item has a height of 20.00 in, width of 0.250 in, length/depth of 0.250 in, and weighs 0.640 oz.

Using this Ancor heat shrink tubing is easy. First, choose the right size for your project. The tubing comes in a 3/16 in diameter and 48 in length. Slip the tubing over the area you want to cover. Then, use a heat source like a heat gun to apply heat evenly. When the temperature reaches 257 deg F / 125 deg C, the tubing will shrink to 1/3 of its original size. As it shrinks, the heat - activated adhesive lining will create a seal. Keep in mind, don't overheat the tubing as it may damage the adhesive or the tubing itself. For maintenance, store the tubing in a cool, dry place away from direct sunlight and chemicals. This will help maintain its quality and ensure it's ready for your next project.