The Small Flower Tunnelscope is a wonderful kaleidoscope made by Roy Cohen. Using 2 different colored wheels and the cast acrylic rod, the images seen are fluid and beautiful. The cast acrylic rod is the best material for conductive light and this creates a high quality in optical visuals. The material is unbreakable. This scope measures 9-1/2"L x 7/8" in diameter at the eyepiece end. The two wheels are each 2-1/2" in diameter and are made from natureal stones and colored crystal glass beads.