Copyright ©2020. Institute of Science and Technology Austria (IST Austria). All Rights Reserved. This file is part of the work described in 3D printed cell culture grid holders for improved cellular specimen preparation in cryo-electron microscopy, Journal of Structural Biology,Volume 212, Issue 3, 2020, 107633, Florian Fäßler, Bettina Zens, Robert Hauschild, Florian K.M. Schur, Institute of Science and Technology Austria, Am Campus 1, Klosterneuburg, Austria and is released under the terms of CC BY-NC-SA 4.0. See file "license.txt" or go to https://creativecommons.org/licenses/by-nc-sa/4.0/legalcode for full license details.