Please note: 1.New shells should be sterilized in boiling dechlorinated water for five minutes and allowed to cool before being given to your crabs. 2.Please never use painted or glazed shells for your pets, as they are dangerous and potentially toxic to hermits.3.Small parts, not suitable for children under 3 years old. Quality guarantee: 1.Due to different monitors and measurements, please allow little color and size tolerance. Thanks for your understanding.2.We provide our valued customers a lifetime guarantee, if you not satisfied with this product, please contact us freely and we provide 100% money back for lifetime.