The Digital Grey Kard is the #1 selling White Balance Card for three reasons: 1) Certified performance and quality. Our tests show the performance of Digital Grey Kard is superior to the other card. 2) Guaranteed satisfaction - We guarantee you will be 100% satisfied with your DIgital Grey Kard or your money back! 3) Unbeatable Value. You get the best card at the best price. Professional photographers, Adobe Photoshop Certified Instructors, and Digital Photography Review Site Editors use the Digital Grey Kard for their personal white balance tool, and you should too. Spectrophotometer measured Lab color values of L* 63.8 a* -1.6 b*-0.4 are perfect for white balance and RAW image converters. Works with all digital cameras, as well as both JPEG and RAW files. Item Includes: Premium Digital Grey Kard consists of three color calibrated reference cards, a convenient lanyard, and a user's guide that makes it easy to achieve perfect color balance. Digital Grey Kard is proudly made in Boston, Massachusetts USA. Perfect digital color every time(tm) - guaranteed. Why pay more? Don't take our word for it- Here is a sample of the 100 percent positive feedback our product gets: "This is the best customer service I have ever had buying from the internet. Absolutely the best!" "Incredibly fast shipping - less than three days from order to delivery." "I'm very pleased with the results I'm getting from this Digital Grey Kard so far. The results under tungsten lights are amazing. THANK YOU." "These cards work wonderfully...a must for any photographer!" The Digital Grey Kard gives you perfect digital color every time. We guarantee your colors and we guarantee your savings!