20 ft: COH (9 Line) Chart SF25 (9 7/8"W x 7 1/4"H

(9 7/8"W x 7 1/4"H x 3"D)

Red (53"L x 49"W) These roll-up blankets are sure to keep any student nice and warm while they rest and relax in your office

It is ideal for hospitals

The soft padding is sure to enhance the patient comfort

20 ft: COH (9 Line) Chart SF25 (9 7/8"W x 7 1/4"H(9" x 14") Sloan optotype chart for vision testing at 20 feet. Features two smaller groups 20 25 to 20 12. 5 for repetitive eye testing. May be wall mounted or used with illuminated cabinets (66003, 66004, 66016, 66090). The Sloan optotypes were developed on the same basis as Snellen optotypes. Sloan optotypes do not use serifs however, but do use a logarithmic geometric progression.