The Desiccant 450 GM Can absorbs dampness from within gun safes and other enclosed storage areas, protecting firearms and other valuables from condensation, rust and mildew. Requires no electricity and remains dry to the touch, even when saturated. Built-in indicator turns from blue to pink to signal when it's time to reactivate, which is done simply by placing in an oven and drying out. | Liberty Safe Desiccant 450 GM Can in Grey