The KST 80A-712 with Steam Venting Package is a high quality tunnel system featuring stainless dual wall construction. It is compatible with the widest range of containers, including those that are challenging to shrink consistently, and many that previously required a second tunnel to complete the task. The KST 80A-712 is a dual-zone system with five rows of steam distribution tubes on each side. Each row is externally adjustable for steam volume, flow and rotary position, so adjustments can be made without waiting for the tunnel to cool. A proprietary nozzle positioner directs steam during the shrinking process, optimizing steam resources and keeping utility costs low.