YoYoJam brand replacement bearings in two different sizes for your favorite yoyo. YoYoJam small bearings fit the following yo-yos: Aquarius, Dragon Jam, Super SpinFaktor, Sunset Trajectory NXG. Large YoYoJam bearing fits the following yo-yos: Axiom, Big Ben, Black Knight, Dark Magic, Hybrid Hitman, Hitman, Journey, KickSide, Lyn Fury, Mini Motrix, Mini Motu, Pro Jam, Sigma Blade Zwei, Speeder, Speed Maker, and X-ConVict.