GREMTUBE® G63 4X is a flexible, high shrink ratio, flame retardant, irradiated polyolefin heat shrink tubing. GREMTUBE® G63 4X offers excellent insulation properties and meets the most stringent industrial and military requirements. It covers a wide range of diameters, allowing reduced inventory. It fits snugly on tight bents. GREMTUBE® G63 4X is suitable for electrical cable insulation, strain relief and cable bundling. It is widely used for joints.