[25 Packets] 100 Gram"Dry & Dry" Premium Silica Gel Packets Desiccant Dehumidifier - Rechargeable Fabric Packet dimension : 4 1/4" x 5 " , Silica Gel Beads Size : about 2 ~ 4 mm Premium Quality (30 Year Experience in Silica Gel Desiccant) - Pure Silica Gel without Cobalt Chloride. NO RISK Pure Silica Gel without Cobalt Chloride & Packet Material is Special Fabric by Spunbond Technology for "Ultimate Moisture Absorption" and "Heat Resistance for Reuse". Packets can be Reactivated by Placing in the Oven for 0.5 -2.0 hours at 200-250F Or Microwave for About 10 Minutes at DEFROST. Don't use over 250F in the Oven. Depending on beads' condition, they may take shorter than the recommended time. Packets are stored in RESEALABLE Self-Standing High Quality Bag for Easy Storage and Use - Air Tight Sealing & Sturdy Bag for Moisture Control.