Heat-shrinkable busbar insulation tubing. Busbar heat-shrinkable tubing are suitable for use on long runs of rectangular or round busbars. The tubing shrinks down to 40% of their original diameter and, due to excellent flexibility, conform tightly to a wide range of sizes. BBIT/BPTM tubing can be slid easily into place, even around several bends and awkward shapes. The wall thickness is controlled by heat-shrink process. Available for over fifteen sizes of busbars from 5 mm to over 250 mm, BPTM/RBPM is suitable for applications up to 24 kV. BBIT is suitable for applications up to and over 36 kV.