Blackout roller blinds are the perfect solution for 100% light reduction. This makes them the ideal choice to block out incoming light in any room of your home or office. Perfect for the bedroom! The back of the roller blind is coated with a thermoplastic, silver-colored layer. This layer not only completely blocks out incoming light but also keeps your room warmer in winter and cooler in summer thanks to its thermal properties. Thanks to the included mounting accessories, these roller blinds are easy to install and operate. Mount the blind either to the wall or ceiling with the included screws and dowels, or hang it on the windowsill. The pull chain can be attached to either the left or right side. Please note that the stated size is the fabric size. The width of the top rail, including mounting accessories, is 3 cm wider than the blind's width. Delivery includes 1 x 80 cm PVC plastic bottom rail, 1 x 80 cm aluminum top rail, 100% polyester blind with silver-colored reflective back coating, 2 x brackets, 2 x hooks, 1 x plastic ball chain, 4 x screws, and 4 x dowels. WARNING: Young children can be strangled by loops in pull cords, chains, tapes, and inner cords that operate the product. To avoid strangulation and entanglement, keep cords out of reach of young children. Cords can wrap around a child's neck. Do not place beds, cots, and furniture near cords of window coverings. Do not tie cords together. Make sure cords do not twist and form a loop.