Each Pack contains 25 SORB-IT CAN 1 Gram Silica Gel Desiccant Canisters Each container measures 17 mm x 13 mm in diameter (11/16 inch x 9 /16 inch) in diameter contains 1 gram of Silica Gel. These SORB-IT CAN 1 Gram Silica Gel Desiccant Canisters are a low-cost, efficient solution that protects the contents of a properly sealed packages or containers during storage and shipment. Desiccant canisters are a small, rigid, cylindrical container filled with Silica Gel, used to prevent moisture damage by absorbing free water within package headspace. Silica gel is made from amorphous silicate, a hard, translucent material with an extremely high capacity for moisture. Recommended use: one 1 gram canister per 400 cubic cm All items are securely wrapped and shipped in a sturdy mailer to assure a safe journey. PLEASE NOTE: Colors of the photographed items may vary slightly from the actual color of the item as all monitors and screens are calibrated differently. Images may also magnify certain flaws that are not as noticeable to the naked eye. Please view all images carefully as they are part of the description and can give a detailed view of the piece.