Bare Ground Premium Blend granular ice melt in a 40 lb box. It is a blend of rock salt coated with Bare Ground Mag Plus corrosion inhibiting liquid deicer which creates a granular ice melt that is 40% less corrosive than standard rock salts. It also starts to work faster and is 60% more effective. Bare Ground Premium Blend granular ice melt keeps working at temparatures as low as -20F. The 40 lb box is easy to store and neater than plastic bags. Carry slots on the side of the box make it easy to pick up and move. Each box is lined with a plastic bag that contains the coated granular blend， preventing spills and leakage.