Borosilicate glass, aluminium, ferritsand, magnetic, 6" tall plus base. Take a time out, this magnetic hourglass lets a moment of time placidly elapse within your soul, and at the same time, thoughts outside remain still. Fascination abounds with this magic, as the magnet in the silver base lets the ferrite powder re-create itself to a new shape, over and over again. Wonderful, how the time passes!