1 Quart Mixed Silicagel Desiccant Beads with Blue Indicating Beads - 2 LBS Reusable 1 Quart Volume of Fresh Pure High Quality White Silica Gel Beads & Blue Indicating Beads(Approx 2 lbs) Including about 10% of Blue indicating Beads which turn Blue to Pink when fully absorbed with moisture Silica Gel Beads Size : About 2 ~ 4 mm. Our blue beads contain only 0.005% cobalt chloride Reusable by heating in an oven for 3.5 hours at 245 degrees F. Blue Beads contain "COBALT CHLORIDE" which may pose health risk and environmental issues.