Get current pricing for Weldotron Shrink Tunnel, SHRINK TUNNEL 7121 Weldotron Shrink Tunnel Model 7121, Serial # Gr83771. Featuring 16 Wide 8.5 High Tunnel Opening X 46 Long, 12 Wide Plastic Mesh Belt Conveyor With . Product Category: Process Equipment, Sub Category: Overwrappers / Shrink: