Inside Mount Precision Fit Designed for inside mount installation with a standard 3/8 inch width deduction. Actual blind dimensions: 21 5/8 inches wide x 48 inches . Ideal for window openings measuring 22 inches wide x 48 inches . Equipped with a unique spring rod that extends up to 1 inch, allowing compatibility for window sizes between 21.7 and 22.6 inches wide with a height of 48 inches. No Drill Installation Patented No Tools – No Drill system requires no holes or damage to your window frame. Quick and easy setup in just 30 seconds without tools, screws, or brackets. Designed for renters, landlords, and homeowners who want an easy, nonpermanent installation option. Supports up to 30 kg for stability and durability. Compatible with a variety of wall surfaces including wooden frames, tile, marble, concrete, and textured surfaces. Cordless Operation for Safety Cord design delivers a neat, uncluttered appearance to any window. Provides a safer environment for homes with children and pets by eliminating dangling cords. Effortless raising and lowering to adjust light levels and privacy as needed. Sound and Thermal Insulation Advanced honeycomb cell construction traps air to enhance energy efficiency. Keeps indoor spaces cooler in summer by reducing heat transfer. Helps retain warmth in winter by blocking cold drafts. Offers effective noise reduction and improved privacy, making rooms more comfortable and peaceful. Practical Use Scenarios Ideal for bedroom windows to create a quiet, comfortable, and private sleeping environment. for home offices or study areas where light control and noise reduction are important. for rental apartments where drilling into walls or frames is not permitted.