The blend of traditional and modern styling makes this hourglass the perfect decoration for a home office, a desk or shelf at work, or any space that's begging for a distinguishable and unique look. The circular base and framework of this piece of art are made of sturdy brass. There's more to this hourglass than its smooth design -- Its functional! One distinctive feature that sets this hourglass apart from others is the way it flips over. With a flip-over you'll hear a quick *click* that lets you know its locked into place. After a fresh flip-over the white sand starts flowing through the glass at a constant rate for 60 minutes. Its accurate to within 60 seconds per hour which is pretty incredible for technology that's over a thousand years old. Each individual hourglass is mouth-blown and comes with a two year limited warranty covered by the manufacturer.