This kaleidoscope by the Parman Bros. is a great addition to your collection. Both the scope and the base are made beautiful walnut. The interior is a 3 mirror system with an oil filled cell. The kaleidoscope is 7 1/2" long and has a diameter of 1 1/4" at the eyepiece and 1 3/4" at the cell end. The base measures 3 3/8" long 1 5/8" deep and 1/2" high. If you like things made of beautiful woods, this is the kaleidoscopes for you. Made in the USA by The Parman Bros.