Pro Series Exercise Ball Slow Deflate Yellow 45cm. Kendall Dressings pulse rate value: ±5% of Chilling Units Freezer pulse rate value: ±5% of measured date 5 seat height * Reinforced cross brace keeps your chair strong and stable * Durable powder coated steel frame * Weight capacity: 450 lbs 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