Agfa Film Density Strip, Structurix ‘DENSTEP’,

Calibrated Agfa Structurix Denstep 

Used for calibrating densitometers to measure x-ray density, certified to National Institute of Standards and Technology (NIST), formerly known as National Buruea of Standards (NBS). The Stucturix Denstep has a range of less than .20 greater than 4.0 and has 15 steps.

Length 24.5 x 3.5cm .