First Static Instances
RobotoFlex GRAD0 Static Instances
RobotoFlex GRAD-50 Static Instances
RobotoFlex GRAD50 Static Instances
Each grade (zip) has 54 families, and each family has 10 weights.
So, you pick the folder for the grade, then size and width you want, and install that folder, and you get all 10 weights of that slice of the design space.