... Easy up tent structure 20x40m hard wall tent for warehouse or factory 1. Specificationshard wall tentSpan20mlength20m/25m/30m/35m/40m, ... 3. AccessoryOptional accessories include PVC window, glass door system, hard wall system, lining and curtain, flooring system, carpet, light-fixture, ... . Easy up structure PVC material simply slots into channels in the aluminum framework - no bungee straps or ties are ...