3M SCRN FLTR PRIVACY-PLUS 13-15IN PF400L

Black - A colour which does not emit any colour of the spectrum. Black absorbs all frequencies of the spectrum.

Filter - A device used to separate mixtures

Filter - An optical device to remove or enhance particular wavelengths of light.

Dust - A general term used for micro particles in the atmosphere

professional - A term used to describe products or people which may be focused on specialist educational training

Professional - A person that is trained within a profession.

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