GENUINE WhiBal G7 Certified Neutral White Balance Card - Keychain Card (1x2.2-Inch) Best specs of any gray card product (a*&b* &lt; 0.5 from perfect neutral) Only WhiBal is precision measured to certify specs of each and every card shipped. Designed for perfect compatibility with Adobe Photoshop and Lightroom. Sturdy and virtually indestructible only .040" thick. Scratch, fade, and water resistant.. Complete with WhiBal card. S-Biner S-hanger/clip, and 6 mil polybag case