The GBS127SGV is a heat shrink sleeve with glueless, 2 to 1 shrink ratio, manufactured by BM Group and measures 12.7mm in width and 1m in length. It is made of polyolefine, a type of synthetic material known for its durability and flexibility. This product is useful for insulating and protecting wires, components, and other items, helping to reduce the effects of vibration, temperature, and moisture on electrical components.