Of course, our product has a smooth surface because of its superb craftsmanship. And it is safe and environmentally friendly because it is made of superb quality materials. Without a doubt, our product can ensure your child's safety because it has good impact and shock resistance, and it can also be used to fill any place. It can exercise your child's hand-eye coordination and promote motor skills in games. It is constructed of PE material. The diameter of product is 5.5cm. The marine ball is thick and resistant, colorful, tasteless, highly elastic, suitable for marine pools, tents, swimming pools. Item Name: Ocean Balls Material: PE Features: Thick, No Odor, Bite-resistant, Entertainment Size Details: Diameter: 5.5cm/2.17" (Approx.) Notes: The quantity is about 100pcs, due to manual calculation, the quantity might has 1-5pcs more or less, hope you can understand, thank you. Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 100 x Ocean Balls