1.two-tone yoga ball, gym ball 2.material:eco-friendly & durable pvc 3.size: ... 4.regular or anti-burst quality 1.yoga ball, gym ball, exercise ball.2.material: durable pvc(phthalate/PAHs free quality ... )Our newest technique to produce two-tone color on one ball. 3.size:45-85cm diameter,4.Logo ... on price. P.S.: can fill with sand inside ball, in order to get better fitness effect.