The GTB 2412 BK, manufactured by Tasker, is an electronic part with a heat shrink sleeve, no adhesive required, and a 2:1 shrink ratio of 2.4mm. The part is black in color, and is made out of polyolefine. It is designed for use in the electrical and electronic industries. The heat shrink sleeve is used provide electrical insulation, strain relief, or cable identification. It is also designed to provide protection against moisture, dust, and general environmental hazards.