The PDC KST 140-712 dual-zone, dual-wall steam tunnel accommodates a range of containers, including those that require a second tunnel to complete the task. It provides over 1,000 in. of live shrink area via 5 pairs of steam tubes in each of the 2 zones. Each row is externally adjustable for steam volume, flow and rotary position. A proprietary nozzle positioner allows the focused application of steam to specific points on a package.