This part is a heat shrinkable sleeve produced by Weidmuller. It is HSS 6.4-19.1 EL W30M, which means it has a nominal inside diameter (ID) of 6.4mm, an outer diameter (OD) of 19.1mm, a wall thickness of 2.5mm of white colored, polyolefin material. Furthermore, it is suitable for use in applications requiring a shrink ratio of 3:1 and is 30 meters in length. It is intended for use in electrical insulation, strain relief, cable bundling and environmental protection, and can be used without gluing.