Freezing Container, PC jar, foam insert, 1 pcDesigned for use with cryogenic tubes, these freezing containers provide simple cooling of samples at the optimal rate to preserve cells. Made with a polycarbonate container, HDPE closure and tube support, and foam insert, they offer a critical and repeatable cooling rate of 1 C per minute, which is necessary for successful cryopreservation and cell recovery. Includes inserts for 1. 0, 1. 8, and 2. 0 ml tubes, with a capacity for 18 tubes.