30 Gram Pack of 10"Dry&Dry" Silica Gel Packets Desiccant Dehumidifier Packet dimension : 4" x 4" Silica Gel Beads Size : about 1 ~ 3 mm Packet Material-Fabric by Spunbond Technology for Ultimate Moisture Absorption & Heat Resistance Packets can be reactivated by heating in an oven for 3-4 hours at 240 degree fahrenheit Packets come in re-close-able stand up foil pouch bag for easy storage and use.