"Optimal Energie save with our roller blinds, pleated blinds, honeycomb pleated blinds, and curtains. Saving energy is made easy. This modern thermal roller blind is not only flexible when it comes to regulating the light that comes through the window, but also functional - it helps you save energy. The thermal roller blind with an extra small wave is coated with aluminum on the back of the fabric (100% polyester), reflecting sunlight or rising hot air. This keeps your room cool in the summer and prevents heat from escaping in the winter. It's also ideal for your bedroom, as the coating darkens the room. The roller blind can be adjusted to any height thanks to a simple step-less operation with the chain pull. You can operate it from both sides. The chain is pre-assembled on the right side, but can also be mounted on the left side. A chain tensioner is included to fix the chain. The chain tensioner fixes the chain in place. The chain is tightly guided along the window sash, reducing the risk of injury to children. If the chain hangs freely, children can get caught in the loop and injure themselves. Thanks to the adhesive/clamp brackets, installation can be done without drilling holes in the window frame, and the blind can be easily removed without leaving any marks. The mounting accessories are included in the delivery. Additional tools are not required. The blind is the perfect solution for any rental property as it can be removed without leaving any marks. Please measure correctly with a firm tape measure, e.g. a folding rule, to determine the application width. Here you measure from the center of the frame on the left side to the center of the frame on the right side. Please make sure that the fabric can run past the window handle. The ordered width minus four centimeters corresponds to the fabric width. Please note that the color on the illustration or picture material may differ from the manufacturer's original item."