The Large Flower Tunnelscope is a beautiful kaleidoscope made by Roy Cohen. Using 2 different colored wheels and the cast acrylic rod, the images seen are unsurpassed. The cast acrylic rod is the best material for conductive light and this creates a high quality level of optical visuals. The material is unbreakable. This scope measures 10.5" long x 1.5" in diameter at the eye piece end. The two wheels are each 2.75" in diameter and are made from natural stones and colored crystal glass beads.