Polyester No Drill Blinds: LazBlinds patented technology No Tools-No Drill system allows installation without drilling any holes on your window frame, perfect for renters, landlords, and home buyers. Easy to install in 30 seconds. Fits all kinds of walls, like wooden walls, tile marble, concrete wall and rough tile Inside Mount ONLY. For better internal installation, a standard 2/5 inch deduction is made to the shade width. The actual blind size is 31 3/5" W x 64" H, the unique spring rod can extend 1 inch in total, allow the blind to fit for window width 31.7-32.6 inch, blind height can adjust from 0" to 64". (Pls Note) Minimum 1 1/5" depth of window frame required for inside mount. Light Filtering: Premium soft polyester fabric provide privacy while allowing a soft light into the room. Perfect for living room, family room, bedroom, dinning room. Cordless Blinds for Windows: Featuring an intuitive pull-down and push-up mechanism that allows for smooth and effortless adjustment to any desired height throughout the day. No tangled or exposed cords! Suitable for families with children and pets, guarantees the safety of your family. Energy Efficient Cellular Structure: Non-sagging 3/5'' cell structure not only provides a uniform appearance, but also insulate your home against outside thermal energy in summer and keeps outside cold away from your warm house in winter. Also, our curtains can reduce the noise from outside to provide you a better environment to work or sleep.