Ikea Dignitet Stainless Steel Support/Corner Fixture for Curtain Wire
For stability you need to use extra support fixtures for curtain wires longer than 55". Up to 110", 1 extra fitting; up to 165", 2 extra fittings, up to 197", 3 extra fittings. Different wall/ceiling materials require different types of fasteners. Use fasteners suitable for the wall/ceiling in your home (not included).