HP 91 Black & Gray Value Pack Ink Cartridge & Printhead -
Standard Yield 775ml - P2V38A

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

Ink - A liquid containing pigments and dyes

Printer - A device used for the physical output of documents

Grey - A colour often associated with old age (going grey)

Key - A physical or virtual device or code used for opening something

Size - is the measurement of how big an object is in space.

Hp - Horse Power. A measurement of power. The greater the horsepower output, the more energy it produces.

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