... kinds humidity indicator labelsone single dot : 8%,10%,40%,50% ,60%,500pcs/can, three dots: 5%-10%-15%, 5%-10 ... %....... four dots: 10%-40%, 20%-50%, 30%-60%..... six dots: 10%-60%.......OEM services allowed ( customer size, shape and printings can be ... done)4, ApplicationPrinted Circuit Board,PCB, LED, SMD LED, IC ...