This 6" solid copper pyramid is open on all sides and bottom to place things in for energizing and charging. It's an energetic amplifier that is said to amplify the healing properties or intention of what ever you put within. The geometric shape is a pyramid, when placed over a crystal grid or crystals, will keep the crystals clean, and protected. Each of the 8 copper tubes measure 6". Great for placing wishes on paper in, doing spells, energy healing, crystal grids, and lots more.