Dollond London presents a premium gift item - an Armillary sphere. This work of art is a replica of what was invented about 2000 years ago. This sphere is made of brass and wood. Size : 4 inches in diameter , height : 5.5 inches , Weight : 320 Grams The armillary sphere instrument consisted of a series of metal rings, similar to the hoops of a barrel, joined together in the form of a hollow sphere with a small globe representing the Earth at the center of the sphere