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Proportionally spaced (logMAR) lines; line
sizes range from 20/400 to 20/10 (6/120 to
6/3) equivalent, 0.05 to 2.00. Printed on both
sides. 7″ x 9″ (17.8 cm x 22.9 cm).
. . . . . . . . . . . . . . . . . . . . . . . . . . . . 728000