LEA Numbers by Barrier Free Access (HK) Limited Price US$85.5 Supplier/s Barrier Free Access (HK) Limited Supplier Code 274000 (IAPB) Country of Origin USA Request a quote Product Description LEA Numbers Single Number Book (274000) Product Features Testing Distance = 3 m/ 10 feet A booklet of 13 pages Includes isolating mask and instructions. Page size: W: 12.7 cm H: 12.7 cm For Distance Visual Acuity Assessment Share: