Sold plain, with no house name on the box - the same 1 mg anastrozole tablet as the branded listings, in the smallest quantity available: ten tablets.
A ten-count blister is a trial-sized pack next to the thirty, fifty and hundred-tablet cartons from the named labs, and it is generally picked by people who want to see how they get on with an aromatase inhibitor before committing to a larger box.
The molecule itself is a third-generation, reversible inhibitor of aromatase, taken by mouth and acting on that enzyme throughout the body.