The product is a TRJBE4800240010050I1 heat shrink sleeve with glueless connection, a 2:1 shrink ratio, a diameter of 4.8mm and a dark green color made of a polyolefin material. It is manufactured by Radpol, a company that produces and supplies electrical insulation materials and components for industrial purposes. The product is used for insulating and protecting electronic components from water, dust, and dust. It's also widely used for splicing and terminating cables, connectors, and wires. It's known for its high-temperature resistance, flexibility, flame retardant and mechanical strength characteristics.