All-natural magnesium chloride crystals deliver extreme ice-melting power. Sensational moisture-attracting properties ensure greater efficiency and faster melt times. Rated less toxic than household baking soda, it's very easy on the environment and half as corrosive to steel and concrete as alternative deicers. Special flake-pellet design minimizes roll-off and blow-away. Remains active down to -25� F. Capacity (Weight): 50 lbs; Quantity: 1 each.