arch honeycomb blackout shades are manufactured from durable non-woven fabric to ensure long-lasting performance and easy maintenance. they feature a laminated aluminium foil film to ensure complete blackout and privacy protection the half round window shades with a 36'' radius, suitable for arched windows with radii ranging from 6 to 36''. our blinds can be easily trimmed to ensure a perfect fit for any irregularly arched window every product includes a collection of accessories that effectively prevent the blind from tilting or falling. furthermore, all items are equipped with sturdy double-sided tape, eliminating the need for complex tool installation the outstanding feature of our semi-circular blinds lies in their unique honeycomb structure, which guarantees excellent heat insulation and noise reduction properties. by keeping your room warm in winter and cool in summer, these blinds offer optimal comfort if you have any questions, feel free to communicate with us, we will answer you online, you will enjoy a pleasant shopping experience For the second use, we are equipped with clips that can be used to fix the fabric. You can install the blind on the regular window and adjust the opening and closing of the curtain through the clips. Myshade Arch Window Shades Half Circle Blackout Cellular Shades Cordless No Drill Blinds for Windows Half Moon Honeycomb Fabric No Tools Room Darkening Shades Easy Install (1PCS White 72"W X 36"H)