j/fit Anti-Burst Ball,  45cm - 85cm 34-inch (85 cm) stability exercise ball for targeting your abs, back and gluts Made of burst resistant material that can hold up to 2000 pounds; deflates slowly if ever punctured Strengthen and tone your entire body by giving your muscles constant resistance from every direction Great for people of all ages and all fitness levels Includes air pump and exercise guide; This ball is 85cm, it will blow up to full capacity, please read inflation instructions