1 Quart Dry-Packs brand Blue Indicating Silica Gel Beads * This is Indicating Silica Gel will turn Blue to Pink when fully absorbed with moisture. * Great for refilling Air Compressor Desiccant Filters, Machinery using volumes of Desiccant, Etc * Silica Gel beads are 3-5MM in size * Unlike other desiccants, silica gel is non-friable and won"t disintegrate after repeat regeneration