Please read description carefully.
Do not base your order on the picture presented.
Linear-spaced lines; line sizes range from 20/80 to 20/16. Lines are labeled with 20' notations only. This chart can be used in Good-Lite's illuminated ESV1200, ESV1500, Model A+, Model A cabinet or hung on the wall. Chart size is 9" x 14" (22.9 cm x 35.6 cm)
20 feet, 6 meters testing distance.
Medex SKU: GL-600725