20 ft: Hand Symbol (8 Line) Chart Unavailable Features a semi-rigid comfort ring

Features a semi-rigid comfort ring that holds the bag open

which makes them budget friendly

This poster gives a visual of the endocrine system and what it does inside the human body

Half leg 25" and Full leg 32"

Auto shutoff when not in use

20 ft: Hand Symbol (8 Line) Chart Unavailable Features a semi-rigid comfort ring(9" x 14") Hand optotype chart for vision testing at 20 feet. Hand symbol visual acuity charts are great for testing preliterate children. May be wall mounted or used with illuminated cabinets (66003, 66004, 66016, 66090). Having only one optotype used in different directions, Hand symbol charts are similar to Tumbling E and Landolt C charts. Often used for preliterate children in school screenings, the child simply indicates which direction the hand