You can do it by yourself." q& X, ^) V( _* g% F- }5 }' j, V+ t
: H5 \7 w. H6 [) h; K$ D( D" O/ `- {they have a special tool to force in, just right beside the screen, or simply jsut buy a package with tool and screen.7 l5 `: `; ~& Z: Z) m" N! y
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just be careful the size and the length, there are 2-3 different size, for patio door or for window.