T Box Blinds 4 x 4 Blinds have 3 or 4 weather stripped, slider windows that are bronze in color. Door windows are extra. Full size 60″ x 24″ walk-in door, fully cased with factory weather stripping and standard door knob. R-Factor rating of 7, with 3/4 thick foam walls and one piece fiberglass construction. Equipped with wall-to-wall [...] ...