Aluminum Canister Contains 40 Grams Of Moisture Indicating Silica Gel. * Canister measures 4" x 2" x 1". * Can be reactivated by heating in the oven. * Fits into all camera cases including Pelican 1500d. * Sturdy, Durable, and Reusable Canister with see thru window to view coloring changing Silica Gel.