Cando Inflatable Exercise Ball (Super-Thick, Yellow, 18 inches)
The Cando super-thick inflatable exercise ball is the thickest and strongest among all Cando exercise balls. Made of tough phthalate-free material, the Cando super-thick exercise ball can be under-inflated for a soft feel, or fully inflated to produce a more resistant, bouncy feel. The yellow super-thick exercise ball measures 18 inches in diameter when fully inflated.