Injection molding can produce many identical copies at large scale, but unique considerations must be addressed to ensure that devices seal correctly; channel edge surfaces sanded to create an even plane sealed best.69 Reproduced from Lee, U. N.; Su, X.; Guckenberger, D. J.; Dostie, A. M.; Zhang, T.; Berthier, E.; Theberge, A. B. Lab Chip 2018, 18, 496-504 (ref 69), with permission of The Royal Society of Chemistry.