Storm Windows A Quality Unit For a Low Price! MODEL #200 SELF-STORING STORM & SCREEN WINDOW FEATURES: may be used as a prime inside unit may be used as a wood door insert deluxe rust proof extruded aluminum construction compression sealed jamb or header vertical or vinyl track sash glide in vinyl track poly-pile weatherstripped positive interlocking meeting rail adjustable sill expander shock proof wrap around glazing removable to the interior for easy cleaning The best Aluminum window on the market!