Product name: louver window frame Material: Aluminum Alloy Model Number: 4" 6" Opening Pattern:Horizontal louver window frame 1) High quality 2) Reasonable price 3) Strong package material :aluminum alloy,aluminum plastic,plastic,steel 2) size :4" 6" 3) blades :3,4,5,6,7,8,9,10,11,12,13,14,15,16 hot sale aluminum louver window frame louver window frames