With the GURTFIX repair kit, you can easily repair and replace an old or worn roller shutter belt without having to open the roller shutter box. This GURTFIX repair kit is designed for the MINI roller shutter system and includes a durable roller shutter belt that is 14 mm wide and 4.3 m long. The repair kit consists of a belt, a color-coordinated adhesive strip, a stainless steel fixing set, and a practical mounting aid. During installation, the new roller shutter belt is securely connected to the old belt about 10 cm below the belt guide. The worn roller shutter belt is then cut flush, and the repair site is covered with the color-coordinated adhesive strip. Schellenberg tip: To calculate the required length of the belt, simply multiply the height of your window or door by a factor of 2.5.