Real swine lungs treated to serve as simulated human smokers lungs. The swine lungs have been stained realistically and then specially preserved by the BioFlex odorless, nontoxic process that retains the texture and elasticity of fresh lungs. With a palpable simulated internal tumor and a physical simulated external tumor. Remember- smoking is a known cause of lung cancer! Special order item. Please allow 2 weeks for delivery.