Consists of Blank, ND0.5, ND1.0 & Holmium filters housed in Black Anodised Aluminium holders
High end plastic casing with snap lock lid and foam cutout for each filter
Includes Calibration certificate from Hellma Germany for Absorbance at specified wavelengths.
ND filters are suitable for confirming Absorbance accuracy in the visible region.
Holmium filter suitable for confirming wavelength accuracy in the UV-Vis region.
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