The Gurtwickler was used as Amazon, delivered very quickly. Because of our kitchen window the roller shutter (cotton) is broken, we had to replace it. The new belt is made of a plastic fabric which is very hard and very smooth on the outer edge, so the shutters can be bad pull. Since we have a large kitchen window and a correspondingly large blinds, we opted for an electric Gurtwickler entschieden.Es These are the successor of Rollo Tron was 9200. Changed the design and low power standby has been reduced. From