The Color Mixer Accessory Kit has 18 cards (64 mm x 89 mm) and a manual with 9 associated lab activities. Each of the 7 filter cards has its transmission spectrum printed on the card. Each of the 11 color cards is printed with a different color and its associated relative reflectance spectrum. Printed colors are defined by the Pantone color matching system. This accessory kit was designed especially for use with the Color Mixer.