These blinds roll up on a dowel or tube and are normally made of vinyl or display screen material. The commonest substitute gadgets for these window coverings embody the twine, clutch, and tensioner. Replacement parts are often available at a neighborhood home enchancment store or online. Just remember at all times to deliver the window overlaying with you when seeking assist. If you can’t repair the issue your self, call in an expert for a free estimate.