Features: 1. The 3 in 1 balance cards set consists of gray, white and black balance cards for digital photography. The grey card is for accurate exposure, the white card is for setting the white balance, and the black card is for "shake black card" exposure. 2. With the balance cards set, you'll get correct color balance, in any shooting situation. 3. The balance card set is easy-to-use, ultra portable and economic tool. It is a must have tool for photography lovers. 4. It adopts foldable design, easy to carry, polyester material which is not easy to damage, long service life. 5. Scope of application: shooting focus, metering, white balance adjustment, reflector. Specification: Material: Polyester Size: Approx. 37*37cm/ 14.57*14.57inch (Grey Card, White Card, Clack Card) Packing List: 1 * Focusing Plate 1 * Storage Bag 1、The 3 in 1 balance cards set consists of gray, white and black balance cards for digital photography. The grey card is for accurate exposure, the white card is for setting the white balance, and the black card is for 2、With the balance cards set, you'll get correct color balance, in any shooting situation. 3、The balance card set is easy-to-use, ultra portable and economic tool. It is a must have tool for photography lovers. 4、It adopts foldable design, easy to carry, polyester material which is not easy to damage, long service life. 5、Scope of application: shooting focus, metering, white balance adjustment, reflector.