wisedry Silica Gel for Drying Flowers 5 LBS (2.2KG), Fine Crystals< 1mm, Color Indicating Desiccant, Reusable Silica Sand[ Fine Crystals < 1mm ] Flower drying DIY craft purpose small beaded silica gel with dust treatment, to avoid physical impacts on petals, and more healthy. Please wear mask & gloves when operating if required [ Color Indicating ] Contains orange beads, when the orange changed to dark green, indicates the silica gels in saturation [ Reusable ] Reactivate the silica gels by microwave or oven, when dark green beads back to orange, reuse as new [