This astounding collab between Josh and Travis is #1 of 1, the only one that exists anywhere, and it...is....AWESOME!! Each side features a master section from one of these master artists. The rainbow retti is as tighty-tight as they come, and Josh absolutely NAILED it with this one! Then you've got Travis' gorgeous fumacello to perfectly contrast the rainbow of Josh's side, the super bright waterfall of color versus the earthy tones of fuming. Josh put the marble together and thus we see his signature stellar pinwheeling and millie around the equator. You will almost never see a retti millie as perfect as that blue and green one, crazy sweet glass! Perfect wigwag millie alternate between those retti's. All in all, an absolute master work of spherical goodness!