20 ft: Hand Symbol (8 Line) Chart CLIA Waived The only alcohol-free disinfectant wipe

The only alcohol-free disinfectant wipe with a 3 minute contact time

Accuracy:   Saturation (70%–99%+) ±2% or ±2 digits

They have excellent strength and durability yet are soft to the touch

this training valve offers big savings over using standard one-way valves

convenient

20 ft: Hand Symbol (8 Line) Chart CLIA Waived The only alcohol-free disinfectant wipe(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