Kolpak Walk-In Cooler Freezer Boxes are engineered as cam lock panels. The Walk-In Cooler Freezer Panels have 4" foamed-in-place urethane foam with an R-Value of 33.98. This series of Kolpak Walk-Ins can be located inside and outside the building. All Options for the Walk-in Boxes will be in the Related Items Tab. Keep in mind that many other sizes of Kolpak Walk-Ins Cooler and Freezers are available.