Apple, Inc 1 article published in JoVE Bioengineering Scalable Fabrication of Stretchable, Dual Channel, Microfluidic Organ Chips Richard Novak*1, Meredyth Didier*1,2, Elizabeth Calamari1, Carlos F Ng1, Youngjae Choe1, Susan L Clauson1, Bret A Nestor1, Jefferson Puerta1, Rachel Fleming1, Sasan J Firoozinezhad1, Donald E Ingber1,3,4 1Wyss Institute for Biologically Inspired Engineering, Harvard University, 2Apple, Inc, 3Harvard John A. Paulson School of Engineering and Applied Sciences, Harvard University, 4 Here, we present a protocol that describes the fabrication of stretchable, dual channel, organ chip microfluidic cell culture devices for recapitulating organ-level functionality in vitro.