Pesilux 1.5" Single Cell Top Down Bottom Up Cordless Cellular Window Shades Light Filtering & Blackout Blinds for Windows 【ENVIRONMENTALLY FRIENDLY RECYCLABLE MATERIAL】Persilux light filtering cellular shades is made from recycled materials, which is a great way to continue your eco-friendly lifestyle.They come in multiple fabric colors as light filtering or blackout. Special honeycomb structure offers features such as energy saving & thermal insulation & noise reduction 【EXCELLENT ACCESSORIES】The headrail and bottom rod are both made of aluminum, they are weighted and rigid so it hangs flat and prevents from wind blowing. The headrail and bottom rod are color-matched with the fabric, which makes the blind look more clean and comfortable. Installation brackets, mounting hardware, mounting video and instruction book are provided for quick and easy inside or outside mount; it can be easily removed and still able to pull down the blind with ease. 【UPGRADED LAMELLAR SPRING SYSTEM】Persilux upgraded lamellar spring system has passed 10,000 times usual lifting or pulling down tests for each blind and makes it easy to raise and lower the blind evenly every time and stay balanced automatically; it retracts and extends smoothly with constant force; our patented spring winder inside prolongs the lifespan of the springs, avoids the rebound or sagging performance and simplifies the mount of the blind. 【100% SATISFACTION GUARANTEED】 We provides professional customer service before and after purchase; we always respond within 24 hours. If there is any problem with your usage in the future, please feel free to let us know.