... papers 1.Lead-free RoHS compliant; 2.OEM allowed; 3.High quality; 4.Economical cost, convient use Moisture indicator papers ... -(with cobalt)1,Lead-free ROHs compliant2,reversible color change,3,quick delivery within 24 hours4, OEM allowed5, cocl2, coblat ... , size and RH can be made by customers' needs4, ApplicationPrinted Circuit Board, PCB, LED, SMD LED, IC,electronic packaging , optical equipment, ...