Graham-Field Ishihara Test Chart Books, For Color Deficiency Type_Blood Collection Tubes One-size fits most - circumference

One-size fits most - circumference range depends on band size

Note: Complete color selector sheet can be found in Media and Literature section

Arms Adjustment Range: 6 inches

Oral Scoop design has wide surface area to provide breath capture even in the presence of shallow breathing

700 lb Yes CE18TB: 18 Ga x 90 mm Tuohy

Graham-Field Ishihara Test Chart Books, For Color Deficiency Type_Blood Collection Tubes One-size fits most - circumferenceAccepted by leading authorities as a simple and accurate method for discovering congenital color blindness and red green blindness, each in two forms, complete and incomplete. Includes four special plates for tests to determine the kind and degree of defect in color vision. Makes use of the peculiarity that in red green blindness, blue and yellow appear remarkably bright compared with red and green. Color plates encased in specially designed album