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81 Well Microtube Storage Boxes by Heathrow Scientific offer secure lower temperature storage for microtubes and cryogenic vials. The tube storage boxes are made from polypropylene and have an easy-open friction fit lid. Light blocking for light sensitive samples. Uniform wells with location identification help keep samples organized and enable quick sample retrieval. The tube capacity is conveniently located on the outside of the box. Translucent vibrant colors with a distinctive debossed wave design enable color coding options. A frosted area is located on the outside of the tube storage box for easy labeling. Autoclavable. Tube Size: 1.5/2.0mL, Wells: 81, Well Dia: 12.3 mm, Dimensions: 5.1 x 5.1 x 1.9 in (13 x 13 x 4.7 cm), Qty: 5/pk, Color: Black.