“…Both holders can be used for roomtemperature (RT, 293 K) data collection and are compatible with sample-changing robots. They provide for a wide scanning area and are suitable for post-crystallization treatments such as ligand and heavy-atom soaking (Li et al, 2015;Rucktooa et al, 2018;Huang et al, 2018). The holders can be used with a host of in situ window materials such as cyclic olefin polymer (COP) (Axford et al, 2016;Apel et al, 2019), cyclic olefin copolymer (COC) (Huang et al, 2015(Huang et al, , 2016El Ghachi et al, 2018), biaxially oriented polyethylene terephthalate (Mylar) (Broecker et al, 2016) and silicon nitride (Cherezov & Caffrey, 2007;Murray et al, 2015;Roedig et al, 2015;Owen et al, 2017).…”