The aluminum step wedge is the standard tool for evaluating the dynamic range (latitude) of a digital or film-screen imaging system. This wedge provides 11 steps in 3.2mm increments.
Radiographic Aluminum Step Wedge
Gammex
Note: Pricing for this product is only available by quotation.
Radiographic Aluminum Step Wedge
https://imagingsol.com.au/product/radiographic-aluminum-step-wedge