The Nor-Lake KLF7766-C Walk-In Freezer is built of modular panels, and are insulated with foamed-in-place CFC Free polyurethane insulation. This Walk-In Freezer has a steel interior and exterior finish, and locking deadbolt handle for security. This Nor-Lake KLF7766-C Walk-In Freezer is also known as: KLF7766C, Modular Walk-In