- Weight: 0.7 grams
JB is of the "Ball' series of bottoms, and is most similar in size to WB. What is unique about this Bottom is the tiny spikes all over its round surface. These reduce the amount of surface area touching the stadium, making it less effective for Defense than WB. JB has found above-mediocre use in one combination only, which is a Left-Spin Destabilizer Combo: L Drago 100JB.