These Interchangeable Kaleidoscopes, Stand 8 1/8 inches tall. Approx 2 11/16 inches in diameter. The body of the kaleidoscope is made of A durable black powdercoat. There is a nicely made black plastic peice that snaps in to hold the cell and unsnaps to allow cells to be changed in and out. The eye piece Body and Object cell housing are Aluminum and are powder coated. 2 mirror system and oil filled cell. The oil filled cell is interchangeable does indeed come with one puck as shown here. This one puck that is included is the bouganvila cell. Each puck is 2 1/4 inches in diameter by 7/8 inches thick.
Superior Mirror Construction, Interesting variety of colors and textures in every turn and superb optics makes Judith Paul's Kaleidoscopes highly recommended.