3" Black Pinhole Screen with 0.6mm Aperture Item Type_Animal Model Life-size right lung separates into

Life-size right lung separates into two parts exposing bronchial tree and alveolar structure

this decade resistance box substitutes for fixed resistors in circuit experiments

Needle valve and flame stabilizer deliver fine flame control on this liquid propane Bunsen burner for precision chemistry and biology heating work

5-inch stainless steel connecting rod grips apparatus up to 3

3" Black Pinhole Screen with 0.6mm Aperture Item Type_Animal Model Life-size right lung separates intoBlack 3 inch circular disc 0. 25 inches thick with a 0. 6mm central pinhole, mounted to a total length of 4. 6 inches for clean pinhole imaging and diffraction studies.