This is a package of green heat shrink tubing. It has an outside diameter of 1/8 in. and an inside diameter of 3/32 in.. It is great for insulating electrical splices, and also covering electrical plugs and connectors. Packaged in 3 in. lengths. The tubing shrinks to about 3/64 in. in diameter. The tubing can be shrunk by way of a heat gun, butane lighter, or a soldering iron.