This visual testing chart is made of cotton and wood material that is for use, with clear printing pattern, sturdy and not easy to wear. Designed with different kinds and sizes of patterns, can test precisely how is your eyesight going on. It is suitable for home, school, clinic, etc. Features -Color:Multi -Material: cotton, wood -Size:48.00X40.00X1.80cm/18.86X15.72X0.71in - Very easy to hanging the wall. You can use it to check the vision of the whole family. The printing is very clear. - Simple structure design, easy to use, clear handwriting, easy to identify, this is very useful and practical. - The visual testing chart for examination has very accurate testing result, can be very useful and reliable. - The visual testing chart is easy to test the vision, simple to operate, bring much convenience to your daily life. - Made of cotton and wood material, this wall visual testing chart is safe and practical to use, has . Package list: 1 x visual testing chart