Heavy Duty, Commercial Grade! These balls were designed & manufactured for the more abusive commercial operations in mind. These balls were just as suitable for any home use by kids over 3 years old, because these balls were soft enough, and yet durable and safe enough to meet the lesser demanding home environment. Each ball was tested to withstand over 150 pounds of weight. * Manufactured exclusively for CMS using 100% non-PVC Virgin (non-recycled) PE Plastic Material, both Phthalate* & Lead Free. Using a unique 2-stage blow-molding process to ensure consistency of thickness; quality; smooth seam and surface. These balls meet all new toys safety standard. (*Phthalate – a chemical additive used to rubberize PVC Blended Plastic, has been identified to be a health concern to children and adults). For the kids with tons of energies and just want to have fun! And, for the parents (or grand-parents) who would not object to chase after a few balls, this one (or 500) is for you! 😉 * Backed by a 90 Days Replacement Warranty, guaranteed against Crushing (Denting is normal, will return back to original shape), Cracking or Deformation, or your Money Back. ***** Beware of the less expensive 2.5" balls, as you would need twice the count of the smaller 2.5" balls, or 60% more in numbers of the 70mm balls in order to fill the exact same volume filled with these larger 3" balls. (see chart) ***** Other quantity packages available on heavy duty commercial grade balls, please check separate Amazon listings: * for 100 Balls = ASIN# B00AN1GF96 * for 150 Balls = ASIN# B00AN1J3QI * for 200 Balls = ASIN# B00AN1M6ZS * for 300 Balls = ASIN# B00AN1SSJQ * for 400 Balls = ASIN# B00AN1V6ZY * for 500 Balls = ASIN# B00AMJC7RI ***** Please contact seller for any additional product details or questions.