- Easy to install thanks to clamp supports - Our blackout roller blinds are attached/hung directly on the window casement without drilling - using the supplied clamp supports. The degree of darkening is 100% - i.e. there is no light transmission. The fabric grammage is 220 m². As soon as the window is covered with the thermal blind, no light comes into the room due to the silver thermal coating. The window blind can be operated via a pulley, which you can flexibly and easily attach to both sides of the blind. The fabric outlet is variable, you can mount the blind (the roller) towards the room or towards the window. The clamp support has an adjustment range of 1.5 - 2.5 cm. The widths of the roller blind refer to the pure fabric, add a total of Approx. 3 cm for the holder. The window blind can be shortened in width at your own responsibility, in such a case the return of the roller blind is excluded. The length of the window blind can also be shortened, the weighting bar of the roller blind must be removed from the fabric with a little force. Then the fabric is shortened straight with a cutter knife and folded into a hem and inserted into the strip. Box contents: roller blind, the complete bracket including clamp supports and adhesive strips (for better grip), pulley, pulley holder and assembly instructions (English language not guaranteed). We also manufacture thermal blinds and double roller blinds to measure - corresponding offers, as well as different widths, can be found in our shop