Trim-at-Home for a perfect fit using our patented measuring scale and a straight edge kitchen knife * The 48-Inch width can be trimmed to fit windows 28-Inch to 48-Inch using our patented measuring scale * Permanent installation in seconds with peel-and-stick application. Requires no tools, screws or brackets to install * The energy efficient, single cell 9/16-Inch non-woven polyester honeycomb cellular fabric provides a stylish look in any room * Cordless lift mechanism provides easy operation; safe for children and pets