Q-Cups are coated aluminum sample holders for the EDGE Extraction System. Q-Cups consist of a cylinder piece which holds the sample, and a threaded bottom piece which holds the Q-Disc filter. This kit includes 12 Q-Cups, which is the maximum number of samples that can be extracted in a run. For efficiency, it's recommended to have two sets (24 Q-Cups) and two Glass Vial Racks. This would allow one set to be ran in an EDGE, while another set is being prepared.