1The hard plastic core is covered with silicone feeler, and the hardness and elasticity can adapt to various adjacent tooth space. 2Can adapt to various adjacent tooth space, can withstand high temperature and pressure cleaning. 3The oval inner core has a good toughness strength. Combined with silica gel, it can adapt to various adjacent tooth spaces. 4Make the shaped pieces are closely attached to the subgingival teeth. Reliable in use. 540pcs/ box, there are 2 different colors available, you can choose by your needs.