Lung-Model-Demo-Kit-RVFM-52-2628-p-This-comprehensive-kit-
Includes::-all-the-necessary-parts-required-to-make-a-lung-model-demonstration-Simply-attach-the-latex-rubber-sheet-to-the-bottom-of-the-bell-jar-using-a-rubber-b&-or-string-By-pulling-down-or-pushing-up-the-latex-sheet-the-balloons-can-be-made-to-inflate-or-deflate-simulating-the-effect-of-the-diaphragm-on-the-lungs-p-RVFM-Lung-Model-Demo-Kit