These basic 100-place cryo storage boxes, in different bright, attractive, assorted colors, offer reliable storage of cryotubes and your samples. Each box is constructed from tough, durable polycarbonate with crystal-clear lids and high-contrast alphanumeric indexing for easy sample visibility. Polycarbonate boxes allow storage at temperatures as low as -196°C and up to 121°C. All cryo boxes are carefully designed with drains and vents to assist in air exchange and prevent pressure build-up.