... "(can be made as customer's request); 2, Strong aluminum... Greenhouse Specifications:1, size:212cm(W)*281cm(L)*220cm(H)/6 ... );2, Strong aluminum frame with gutter system;3, Polycarbonate (For window & wall, hollow, 4mm thickness, with UV coating & protect film, ... Steel material, rust proof;5, with one sliding door ,two top windows for excellent ventilation;6, With detailed assemble instruction manual ...