Please read description carefully.
Do not base your order on the picture presented.
LEA GRATINGS are for preferential looking test situations with infants or children and adults with disabilities to determine detection acuity.
Grating levels printed on each handle are: 0.25, 0.5, 1.0, 2.0, 4.0 and 8.0 cpcm (cycles per centimeter of surface).
Includes instructions and storage case.
4 paddles 8" (20 cm) in diameter.