Fully Autoclavable Molded from reinforced nylon for strength and durability with no coatings to chip, peel, or rust Single piece, three (3) tier grid design for secure and stable racking of tubes Good temperature and chemical resistance to withstand a variety of lab procedures Large, flat endplates for labeling and easy sample identification Dense nylon material will not float in water bath 15mL conicals fit in 20mm racks and 50mL conicals fit in 30mm racks Seven colorful options to keep samples and benchtop organized