material:clear louver glass color: clear thickness:4mm,5mm size(inch):4"and 6" pattern:clear LOUVER GLASSFUCTIONSVentilating direction can be controled by adjust blades ... as customer's request colour: clear , blue , tea , grey , green etc. Packed in carton box. Glass paper be inerlayed between each sheet ... business and friendship will have a good development 4mm.5mm clear louver window glass