Come and see our amazing products.This mini Pilates ball is about 25cm in diameter and is made of high-quality environmentally friendly PVC material. There is a white ball plug on the ball. Please remove it before inflating the yoga ball. Fitness ball is the perfect tool to increase balance core strength, strengthen inner thighs and increase flexibility. The inflatable compact outer ball is very suitable for people suffering from hip, knee or sciatica problems, and can improve athletic ability and performance. Pls confirm further with us if any query about packing info, inventory status and time schedule.