It is gym ball air stopper. Yoga Ball Inflatable Bed Pool Air Stopper Plug Pin Fits for most gym ball size: 55cm, 65cm , 75cm and 85cm. Color: white Material: Plastic Length: 5.2cm Top diameter: 1.2cm Package: 10 x Gym Ball Air Stopper Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.
Fruugo United Kingdom