DGK Color Tools DGK-XL Extra Large Size 3 Card Set - 4" x 5" White Balance Card 18% Gray Card for Digital and Film Photography with Premium Lanyard Made in USA by DGK Color Tools, the White Balance Authority (tm) Includes three XL size 4"x5" color calibrated reference cards Supplied with a red or gray adjustable carrying strap with detachable clip and safety release. Complete, easy to follow instructions included Works with any digital camera, for JPEG and RAW files