pangshi Large Size 3 Card Set - 4" x 5" White Balance Card 18% Gray Card with Premium Lanyard for Digital and Film Photography 1.New Brand, high quality. 2.Includes three color calibrated reference cards, carry strap 3.Each card 4" X 5" waterproof plastic 4.Works with any digital camera, for JPEG and RAW files 5.Supplied with a premium adjustable carrying strap with detachable clip and safety release.