Had my 3 x the set ordered, for my three windows. Unfortunately a flop, because the Velcro adhesive tape, which is glued into the frame, is not so sure adhesive. In the beginning it has been good to the process, but the adhesive strength is so ........ after about 3 days, (without window bars)! sparked in part again, and unfortunately stuck only on the hands ......... modesty. The window grille itself is already ok, and also good for the process, if not for the Währe with Velcro adhesive tape .....
Get me again of Thesa minor caves, though a bit more expensive, but the sticks wehnigstens so about 1 1/2 to 2 years.
I for my part am going to the screen door set of 3: ... no longer buy 130x150cm window grills made of polyester in anthracite.