Orange Silica Gel: Size: 1-3mm, 3-5mm, 4-6mm, etc. Package: carton drum, plastic bags, ... ,3 Its color varies as humidity changes.Use:Mainly for drying and indicating humidity of precision instruments, medicine, ... >Green YellowRH=50% >Dark Green Size :1-3mm,2-4mm,3-5mm,4-8mm Packag: 25kg compound bag or 25kg ... Silica Gel Desiccant to green or to white (1-3mm, 2-5mm, 4-6mm, etc) for power transformers