C.H.I. Stamped Shaker Model on display in the showroom! This is the C.H.I. Model 2518, which is a polyurethane insulated steel back door that has an R-Value of 16.55. This door displays the Driftwood Accent Woodtone on the exterior and showcases the "Old Glory" accent image printed on the interior. We completed this look with the appearance package which includes a tailored finish for the tracks and hardware in a white powder coated finish!