Black Mountain Products ProSeries Stability Ball was designed to withstand a 1 inch gash without popping, but instead will slowly deflate. This gym grade stability ball brings a professional quality product to your home at an affordable price. With help from reputable fitness instructors, they can help you perform different types of stability ball exercises ranging from beginner to experienced exercises. With our ProSeries exercise ball, you can target upper body, upper/lower back, abs/core, and legs. The ProSeries stability ball will aid in improving your health and overall wellness from the comfort of your own home.