Quality materials ---- Grey Card White Balance is made of quality materials, pliable, wear-resistant, lightweight and durable. Grey Card for Right White Balance Convenient for use ---- The neck strap with quick-release plastic buckle on the end, convenient for your use. Quality materials ---- Grey Card White Balance is made of quality materials, pliable, wear-resistant, lightweight and A gadget, yes, but useful on certain special occasions in which one wants to be sure of the exposure meter reading. Specifications: Packing included: 1 x Gray card 1 x White card Helpful accessory ---- 18% Grey Card Photography is helpful accessory for photography lovers. I'm not a pro - but a volunteer taking pix for a charity to sell on line. Certainly good enough for pix that will be viewed on screen by the general public. They are very useful to keep in my camera bag for both white balance and medium gray assessment. The dimensions are and each piece is strictly controlled. Color Balance Cards Pixiss Portable Photography Accessories - 12x12 Foldable White Balance Reflector, Grey Reference & White Balance Card, 4In1 Color Correction Card Set And Measuring Tape Lanyard By Pixiss 18% Grey Card Very convenient to have in shirt 18% gray cards are intended specifically to aid on determining the right exposure for graphy, and only coincidentally for white balance I bought these cards while participating in the basic photography course On the recommendation of my lecturer. 30cm Folding 18% Grey White Balance Reference Card Black The dimensions are perfect and each piece is strictly controlled.