For stability you need to use extra support fittings for curtain wires longer than 140 cm. Up to 280 cm, 1 extra fitting; up to 420 cm, 2 extra fittings, up to 500 cm, 3 extra fittings. Different wall/ceiling materials require different types of fixing devices. Use fixing devices suitable for the wall/ceiling in your home, sold separately.
Provides extra support to the curtain wire. Makes it possible for the curtain wire to go around corners. http://www.ikea.com/th/en/images/products/dignitet-support-corner-fitting__36089_PE126980_S4.JPGDIGNITET Support/corner fitting, stainless steelhttp://www.ikea.com/th/en/catalog/products/50172796/501.727.96THB 149