Kolpak Polar-Pak walk-in coolers boast rugged, high-performance construction. Modular panels of 4-in. 100% foamed-in-place non-CFC urethane foam off er superior insulating capabilities. Exterior and interior feature top-quality galvanized metal. Polar-Pak also offers improved air circulation around the coils, making the unit economical and efficient to run. Polar-Pak is flexible enough to be used in virtually any configuration. Some standard 7-ft.-6-in.H units are part of Kolpak’s Quick Ship Program and ship within seven days.