Clear 3" diameter columns filled with thousands of colored bubbles support and illuminate your showpieces set upon the 1/2" thick acrylic shelves. Each model houses internal components within its black acrylic base (including dual air pumps, light fixtures and interchangeable color filters). Additional down lighting is provided within the header as well. All of these are 5 to 6 feet tall offering shapes in elliptical, square or rectangle. Ground shipping only