About The Item: Important! - Internal And External Installation Problems:aluminum Blinds Measure 47.2"w X 64"h.inside Mount,fits Any Window Wider Than 47.2 Inches,best For 47.5" Wide Windows;outside Mount,most Suitable 4" Wider Than Window,like A Minimum 43.2"w Windows.so It Can ...About The Item: Important! - Internal And External Installation Problems:aluminum Blinds Measure 47.2"w X 64"h.inside Mount,fits Any Window Wider Than 47.2 Inches,best For 47.5" Wide Windows;outside Mount,most Suitable 4" Wider Than Window,like A Minimum 43.2"w Windows.so It Can Be Installed On Windows From 43.2" To 47.5". High Privacy Blinds:ideal Venetian Blinds For Privacy And Light Control.blackout Bilnds Control Draw The Cord Left To Lock Or Right To Loose The Shutters,spin The Wand To Til.