... , IC, LED, especially military and semiconductor2, Features:one/1 single dot Humidity Indicator Card-(with cobalt)1,Lead-free ROHs ... , A permanent after-sales service3,Humidity Indicator Card specifications one single dot : 8%,10%,50% 500pcs/can,three dots: 5 ... , size and RH can be made by customers' needs4, ApplicationPrinted Circuit Board, PCB, LED, SMD LED, IC,electronic packaging , optical equipment ...