ENJOY with the 2.175" Tungsten Sphere. Check it out! QUALITY machined sphere for gifts and density experiments LARGE aluminum sphere at 2.175" diameter PERFECT for teachers, home-schooling, science education, and desk toys COMPLEMENTARY 3D printed base and certificate of composition Base included. Sphere is 0.54lbs. Complete your sphere collection! Enjoy an endless opportunity for metaphors and puns. Shock and amaze unsuspecting initiates into the world of metallurgical wonders. Aluminum alloy 2.175" diameter sphere. Great conversation piece. Includes certificate of chemical composition. Machined from precipitation-hardened aluminum alloy, this cube is an excellent contemporary addition for your desk at work or side table at home. Surprise your colleagues and friends with the cube's light density. If you like the cube, don't forget to check out our Tungsten Cubes and Spheres.