Overview: The BalanceFrom Anti-Burst Slip Resistant Fitness Balls combines anti-slip technology with tasteful design to make sure an excellent slip-resistant product. With the help of thick and durable material, BalanceFrom fitness balls are Rated to 910kg to not burst. A free pump included in the package makes the assembly quick and easy. How to inflate. A. Leave the ball at room temperature for a few hours; B. Connect foot pump to the ball's air valve; C. Inflate the ball to about 80% of recommended size. Let it sit for a few hours, then inflate it to the recommended size; D. Insert the plug completely;Note: Foot pump, plug and plug removing fork, a measuring tape are all included in the package.