19mm-6mm Adhesive Lined Polyolefin Heatshrink Sleeving. High quality 3:1 dual wall (adhesive lined) heat shrink tubing. •Inside diameter 18.0mm (as supplied), 6.0mm (after recovery). •Wall thickness 0.93mm (as supplied), 2.25mm (after recovery). Packaged in 1.2 metre lengths. Available colours: black only Shrinks down to a 3-1 ratio = 6mm