One of Belco's most popular models, the STC 2520 has a sealing size of 25" Long x 19" Wide and features the Lighted Viewing Window as a standard included option to help make product change-overs and tunnel set-ups fast and easy. The shrink tunnel chamber size of 21" Wide x 8" High x 36" Long, Watlow digital temperature control, top and two bottom fan controls and variable speed conveyor allow for semi-automatic operation ranging from 18-25 packages per minute. Multiple shift operation and years of trouble free production can be expected from this machine.