Pro Series Exercise Ball Slow Deflate Red 55 cm Jobst Opaque 30 40mmHg Knee 3M Littmann© Classic III Monitoring 8975 3M Littmann© Classic III Monitoring Stethoscope Rainbow Finish Chestpiece black stem and headset Black Tube medical equipment 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