The article itself is replaced in no time fast, the durability is controversial. Because the suspension is made of non-ferrous metal, not like in the clock. But the prudence plays a role, not to be like some neighbors rumreißen the belt or drop the blinds, rather bothers the neighbors, and thus calls on a new repair. The installation is for experienced no problem, as do I emery the belt with sandpaper rough down 20 two-three times uniformly, can be wound clean, another tip, cut off the used belt piece, stick as support scotch tape around and cut it then Instructions for the belt, then remove the scotch tape and excess tissue with a kl. Nail scissors cut. Clamp belt for manual winding and slow slightly taut. poppy