Drive Sphere Kit, 10 Pair, Fastrax 2Pc Retaining Sphere / Glue Not Included (Use Sp61) 53700561

Good Replacement Options - Terrible design flaws on door

These work as intended for replacement on the curtain we have installed. They are however very expensive for plastic spheres. The design on these curtains is terrible. Often, when the spheres break off they rip the curtain and at that point you cannot correctly operate the door. This creates an out of alignment curtain. At that point, your curtains days are numbered and you better have at least 20 spheres on hand for the rest of the year or replace the curtain at a cost of $6000-$7000.