The U.S. Food and Drug Administration's (FDA) OPQ/OPQR is requesting the acquisition of one (1) Automated Dry Heat Flow Through System with 8 Diffusion cells (or equivalent). This Automated Dry Heat Flow Through System with 8 Diffusion cells will be used to perform in vitro diffusion studies using flow through cell assembly to check the drug release and permeation across synthetic and biological barriers. This Automated Dry Heat Flow Through System with 8 Diffusion cells and these diffusion studies will provide valuable information regarding safety, performance, and quality of transdermal and drug products and support CDER’s mission critical missions.