Harm Stackable Stool. This stool that features a stackable design with straight legs will be a great space saver for your home. lightweight powder coated black steel frame supports a thick padded cushion and gives this stool a contemporary look that pairs well with both traditional and modern design styles. The thick foam padding on the seat provides guests with a comfortable seating option for times when you need to entertain them. The stunning structure of the framing makes the seat stable and capable of being matched with almost any motif or decor.