|Overall Size||4.0 in. x 4.0 in. - 101.6mm x 101.6mm|
|Symbol Size||100% Nominal X-dimension in 13 mil (0.33mm)|
|UPC Number||0 00000 41000 7|
|Effective Aperture||6 mil (0.006 In.)|
The Modulation Grade cards are offered in Grades A,B,C,D,F (4,3,2,1,0) of modulation for use in testing bar code verifiers. To achieve degraded modulation, one bar has been altered to a lower reflectance, and the adjacent spaces have been altered to have a higher lowered reflectance (thus creating 2 edges of lowered modulation within a higher contrast symbol). Each card is individually serialized, major values are marked on the card, and all values are included in a written report.