PIXISS premium waterproof and durable photography card set includes an industry-standard 24 patch color reference guide and grey, white, and black cards for maximum exposure and color balance. Used to create custom camera profiles and as a visual color reference. Our custom calibration tools have many uses with video, DSLR, film, and photography. The Pixiss 4 in 1 card set is attached by a measurement-marked lanyard making easy access by wearing around your neck while doubling as a field ruler. Also included is our PIXISS microfiber lens wipe. Keep your camera lens spotless for all those perfect moments.