The interior profile design of the yoyo is a "schwall", featuring an exaggerated well along the steep wall with a moderate response bump, providing smooth binds and plenty of room for string layering. It is a power-forward throw, designed to take advantage of it's weight placement. It is also stable, very.The size and shape fit comfortably in the hand, and combine well with the finish for a nice tactile experience. The cup face and rim are flat, leaving room for painting, engraving, etc. There is an adequate IGR, however. (Note: some of these comments can be interpreted as subjectively objective, and some tester feedback may also be helpful...)Specs:Weight: 63.5g/2.24ozWidth: 42mm/1.65inDiameter: 53mm/2.87inGap: 4.36mm/0.17inMaterial: 7068 AluminumUnresponsive PlayInside the box, you will find:-your selected yoyo, safely wrapped in a sheet of 50% recycled paper that contain sketches and notes of the original concept, as well as some final design notes-a single white Monkeyfinger Designs Vines String (shout out to MonkeyFingeR Ray!!!)-a 1″ colored foam cube, paying homage to the foam cubes that served and secured other yoyos in place before them-a custom letter 'Y' Scrabble tile , thus completing Project Y