Four65 is crushed up Trophy Rock with the same beneficial minerals needed for optimum deer health. Four65 ranges in size from small marble chunks to a fine granular size. It comes in a 30 pound bag. Using it in areas that have heavy populations of pigs, bear and cattle can help keep your mineral site in its intended location. Four65 is also great product to dump into your existing mineral sites giving the deer a higher mineral consumption rate as they dig and eat the soil.