YoYoFactory Flight Offstring Yoyo Color Fire Marble The Flight yoyo for offstring (4a) style play is one of the yoyos that is great for new players trying the offstring style for the first time. The Flight yoyo is the ideal size for an offstring yoyo. In the build of the Flight yoyo, a ring in the inner-hub of each half is featured, and designed for off-axis thumb grinds.