The SpyderCube Color Balancing Hardware from Datacolor is an advanced gray card system, which can be hung from an object or mounted to a tripod. The device features a variety of faces, perfect for helping you correctly white balance RAW files.
Simply take a RAW shot of the SpyderCube in your working light conditions; balance that properly and use it as a preset to apply to other images shot in the same conditions. It is an excellent tool for event photographers whose livelihood depends on properly balanced images.