Sometimes, due to the unpredictable transportation factors, its hard to assure that all of the wood ring won't be broken during the transporation, so if you receive defective dies or missing dies set, please CONTACT US for free replacement. If you are not completely satisfied with our product, we’ll give you money back - whatever the reason.<br><br> Material: wood<br> Outer diameter: 55 mm <br> Inner diameter: 36 mm<br> Quantity: 30 pack<br> Package includes: 30 x Natural wooden rings <br>Pls Dont use under 6 years old.