... 19mm and 22mm etc. Good quality,competitive price. curtain rod 1.rod:single and double and extensiblematerial:iron,aluminumdiameter:12mm, ... ,zinc alloy,aluminum alloy,plastic,crystaldiameter:matching with curtain rodplating finishing or painting finishing 3.bracket:single ... finishing 4.ring:material:iron,plasticdaimeter:matching with curtain rod 5.curtain hook:material:iron,zinc alloy,aluminum alloy 6 ...