The Gor Flex range is made using TPR (thermoplastic rubber) which offers a superb combination of rubber and plastic to give a very tough and flexible toy. The Gor Flex Flash Ball toy from Gor Pets has a ball encased with TPR material which flashes when shaken! It is great for taking your dog out when its getting darker during this season. The Flash Ball has holes around the toy to insert treats. 13.5cm in size.