Made of polycarbonate. Designed to be used at temperatures between -196°c and +121°c and are autoclavable at 120°c, 15 PSIG (1 bar) for 20 minutes. A transparent cover allows the user to see the contents of the box, and is keyed to the base to prevent misalignment. Printed with a Series of squares (numbered from 1 to 25, 1 to 81, or 1 to 100), the surface accepts writing with markers, facilitating inventory control. Removal of vials facilitated by an innovative vial Picker supplied with each storage box.