The Deitz Pharmafill HT6B heat tunnel automatically shrinks tamper-evident, plastic neck bands and/or sleeve labels on bottles, cans, jars, vials, tins and other plastic, metal and glass containers. Designed for use with PET-G, PLA, PVC and other tamper-evident banding materials, the tunnel uses forced air with a combination of convection and radiant heat to deliver uniform heat distribution throughout the length of the tunnel. The tunnel has a double-wall stainless steel construction and heat-resistant curtain at the entry.