Features: It is made from hard resin, similar with plastic, not soft gingival. Durable and waterproof. Good example for teaching brushing and flossing. Use,completely similar tooth model, which can be used to guide children to brush their teeth and learn. Features,the model is very beautiful, suitable for practice prophy cleanings, studying surfaces, casting impression-they are good tool to teach preschoolers how to brush and floss instruction. Upper and lower jaw are connected by hinge, you could open upto 180 degree. Check the total anatomy teeth clearly. Detached upper and lower jaws,clear acrylic cover; translucent and soft rubber gingiva with 24 removable teeth. Specifications: Material:PVC Package Includes: 1 Piece Typodonts Demonstration Denture Model note: Please allow 1-2cm errors due to manual measurement. Due to the difference betweeen different monitors,the picture may not reflect the actual color of the item.