Package includes: you will receive 6 boxes of silica gel desiccants, 40 gram each; The canister is sealed in plastic film that should be removed before using Reusable desiccant bag: silica gel beads can be reactivated by placing them in an oven for 3 hours at 250 degrees Fahrenheit; Note that if you receive silica beads that are already green, it might be absorb moisture during transit or during warehousing Proper size: silica gel dehumidifier measures approx. 4.13 x 2.17 x 0.59 inches/ 10.5 x 5.5 x 1.5 cm in dimension, and appropriate size makes it easier for you to use and store, not take up much space Portable tin canister: indicating silica gel dehumidifiers are tightly encased in a compact tin canister, which is equipped with vents and a hole for easy inspection; The canister is made of aluminum, which will be sturdy and can serve you for a long time Protect your items: silica gel desiccant provides moisture protection for cameras, telescope cases, tool boxes, silver drawers, computer cases and general small enclosed spaces; Each silica gel bead canister absorbs moisture and protects up to 3 cubic feet of enclosed space, which is suitable for using in humid environments and humid seasons