BaaySCI’s 5mL MacroTube® Cardboard Freezer Boxes are made of recyclable material, with a liquid-resistant outer coating. They are shipped fully assembled and are available in a 5×5 version that holds 25 x 5mL Snap-Cap tubes or a 6×6 version that holds 36 X 5mL Screw-Cap tubes. Each box has liquid nitrogen drainage slots and numbered grid markings in almost every conceivable location (top, bottom, sides, etc.). • Attached hinged lid • 5×5 version for 5mL Snap-Caps • 6×6 version for 5mL Screw-Caps • Alpha-numeric coding • Polycarbonate box fits 25 x 5mL tubes • Polycarbonate box usable temp range is -196° to +121°