This 65cm pro swiss ball is rated at a whopping 500kg and is one of the toughest on the market.
Extensively tested by SGS Laboratories for burst-resistance and static loading.

Features - 

• Size - 65cm
• Recommended user height - best for people 5'6 and under
• Weight - 1.79kg
• Material - 6 Phthalate and Heavy Metal Free PVC
• Please Note - this gym ball is unboxed and no pump or free workout guide is supplied.
• Warning: Never leave the Swiss Ball near a heat source.
• Care Instructions: Your ball can be wiped clean using a damp cloth and mild detergent. Avoid using harsh chemicals.

Safety Information:
SGS Labs tested as burst-resistant at 750Kg load. Rated as suitable for 500Kg load. SGS Labs tested with a static load to over 1.5 tons without failure.
Never leave the Swiss Ball near a heat source.