... Wall Heat Shrinkable Tube, 1).3:1, 4:1 shrink ratio. 2).Conform to RoHS (2002/95/EC) environmental directive. Dual Wall Heat Shrinkable TubeKOSOO DW3:1, 4 ... DW (3:1, 4:1) is a flexible, flame-retardant, dual wall, high-shrink-ratio, irradiated heat-shrinkable tubing manufactured by ... fluids, moisture and corrosion. High srink ratio allows for connector-to-cable sealing and makes it possible to ...