Pro Series Exercise Ball Slow Deflate Green 65 cm. Inversion Tables Accessories Firm High Density urethane foam with Color:Red Firm High Density urethane foam with vinyl sewn covering * Length 22 Width 14 Height 3 Colorful weights assist sensory motor planning * They provide feedback for those with difficulty in vestibular or proprioceptive processing * The O Rings secure the weights and allow them to be placed anywhere on the writing instrument * Weights are approx Excellent Retail Packaging * This ball was specially designed to deflate slowly if punctured thereby reducing risk of injury * Provides improved stability at the points of body contact and enhanced performance due to the responsive surface design * Comfortable to sit on * Great grip thanks to built in latitudinal ridges and an outstanding texture that doesn t feel like plastic * Comes with two plugs an inflation adapter a measuring tape to help insure proper inflation and a poster detailing 24 exercises