Dog Vocal Ball Bite-resistant Molar Bone Toy $ 5.60 Detailed parameters: Item: TPR toys Food grade TPR environmental protection material, high resilience, wear resistance, and full of toughness. TPR is a thermoplastic rubber that does not need to be vulcanized. It has a linear molecular structure and is a polymer substance, a simple polymer substance. Due to its safe and non-toxic properties, TPR environmentally friendly materials can be excreted normally even if swallowed by dogs!