Material:The model is made of polyvinyl chloride (PVC) plastic, which is , and has high strength. 6X Enlarged Human Eye Model on base for use in for patient education or anatomical study.You can clearly see all the main anatomical structures of the human eye.The accuracy of this anatomy human eye is the study tool for anatomy students. Functional characteristics: the model is used to display the anatomical structure of human eyeball, such as the three layers of outer membrane (outer membrane, media and intima) of eyeball wall and the main refractive bodies, lens and vitreous body filled inside. The model includes the labeled diagram for the main parts of the eye. Colour: as shown Material: pvc Size: 16 x 15 x 25cm Package Contents: 4 x Eye Model Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.