Notice: This grey board is NOT foldable It is only Twistable/ Stretchable
Features: 1 Brand new and high quality 2 Gray side: Reflectance 18%; Density 0.74 3 Max. deviation of reflectance: 2% 4 Max. error in exposure measurements: 1/8 of F-stop 5 Card sizes: 30cm * 30cm/56cm*56cm 6 18% gray card target heart scale provide accurate metering of center 7 Other face color is pure white, could used for a small reflector