Pro Series Exercise Ball Slow Deflate Red 55 cm Walker Wheels * New adjustable height footrest Ships via truck * New adjustable height footrest provides greater comfort while sitting Five function display indicates exercise time revolution count revolutions per minute (rpm s) and calories burned * Scan feature alternately displays all measurements automatically * Ideal for leg and arm muscle exercising * Four anti slip rubber pads prevent sliding and protect surfaces * Resistance easily adjusted with tension screw * Button cell battery included * Completely assembled foldable design * Limited Lifetime Warranty * 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