Photometric Standard Hf-Srs 1.5 Au 45 mm , Each

Details:

Hf-series (400-700nm) absorbance- 1.5Au (3%t)standard^ hf-series (400-700nm) absorbance- 1.5Au (3%t)vis photometric accuracy calibration standard, external dimensions: 12.5 X 12.5 X 45 mm, nist-traceable filter for validating photometric performance of a spectrophotometer.