Framed artwork of molecular structures - lot of 3

For the budding scientist or pre-med major molecular illustrations of SEROTONIN, MORPHINE and DOPAMINE in matte black wood frames, with plastic (not glass) coverings designed to appear as aged illustrations (on yellowed paper with faux stains) Ready to hang (each frame includes sawtooth hook) dimensions: 9" H. x 11" L. x. 1.25" D Excellent condition