This is a 13.2lbs (6kg) capacity refillable sandbag. Features include : Extra rivets combined with double stitching and interior bias binding for maximum strength. Double handles on both top and bottom provide more comfort. High quality hook and loop closure to assure that the contents stay where they belong. Metal hanger provides more strength. Sand bags are necessary safety items. They prevent light stands from tipping over, support a camera and also act as counterweights for booms.