... by aluminum 6063 T5 aluminum roller shutter,rolling shutter Raw material:Use the high hardness aluminum alloy section of 6063A and 6061,Webster hardness ... enterprise standard Q/320584LBL001-2007;Highlights:1) The sheet of AJ49A has holes like the coin,AJ49Bhas rectangle holes ... ,daylighting,ventilation,it is the substituteof theftproof mesh;The method of turn on/off: 1)Remote control with 100meters; 2) ...