walk on water roller (1) Size(meters): 2.6 ~ 3.5m, ... part of the ball leaks air, the ball will sink in water, it's very dangers for the players. The new ... , even the TPU material broken by the sharps in water, it will not sink in water, player can hold the stainless steel ... The roller ball has the chamber, the player is playing in the second material floor, they can not have the feeling ...