1?Size introduction?The listed size ( 40" W x 72" H ) is the window opening size for inside mount. The actual blind will measure slightly smaller ( 39 3/4" W x 72" H ) to allow space for mounting. (NOTE: The no-drill installation method relies on outward support from both ends, so it is only compatible with inside-mount installations within the window frame. This method does not support outside-mount or top-mount installations that require drilled holes? 2?NO TOOLS NON-DRILLING?The shutter adopts special mounting fittings, which makes it easy to install without drilling, and also avoids damaging the wall. 3?Premium Faux Linen Fabric?Made of high-density woven fabric with a linen-like texture, offering a soft, modern look that elevates any room’s décor. 4?Dual-Layer Light Control?Alternating blackout and sheer stripes in two fabric layers allow smooth adjustment between privacy and natural Light Filtering by aligning the layers. 5?Cordless & Child-Safe Design?Easy hand-push operation with no cords. A sleek, tangle-free design that ensures safety for children and pets.