Teaching tools: Different colors are used to distinguish different positions, and the colors are bright and easy to attract students' attention, so you can to teaching demonstration, which promotes students' understanding and increases classroom fu Lab supplies:PVC material does not have to worry about being broken by students,so It will be a great addition to your lab supplies. Great for school teaching tool, learning display, and collectibles. Material: It made of food-grade PVC environmentally friendly materials, prototype,Handmade in a solid, non-broken. Almost true display of human larynx structure. Size: 11.5*11* 24cm Larynx Anatomical Model 3x magnification,divided into 3 pieces, can help students understand the shape and structure of the respiratory tract and vocal organs. This is a practical model that can show the movement of the epiglottis carotidus in the throat. So you can use this intuitive education for effective theoretical understanding, so as to master the relevant knowledge deeply and clearly