This bubble insert is made of silicone material, ensuring its durability and longevity. It is designed to withstand repeated squeezes, making it a great addition to any collection. The inner ball can be your nice accessory. Features -Color:White -Material:Silicone -Size:6.00X5.50X5.50cm/2.36X2.16X2.16in -Size:7.00X6.00X6.00cm/2.75X2.36X2.36in -Good material: The Bubble Insert is made of silicone material, ensuring its durability and longevity -Durability: This squeeze insert is built to withstand repeated squeezes, making it a great addition to any collection -Fine workmanship: The bubble insert creates a unique tactile experience that is both fun and satisfying -Multiple use: This bubble insert can be used to create a variety of squeeze toys for different occasions -Good choice: The bubble insert provides a great , making it a popular choice for both kids and adults Package list: 10 x Insert Bubbles