CellPack Heat Shrink 633356 - CellPack 145096, The CellPack 145096 SR2LK 70-240 heat-shrink tubing set is designed for cable identification without adhesive and features a 3:1 shrink ratio. This product is black and suitable for phase identification, providing reliable cable labelling and wire identifiers. It is typically used in electrical wiring applications for organised and clear phase marking. CellPack145096 SR2LK 3:1 Heat-shrink Tubing Set Chemical & UV Resistant