Color Change: from green to yellow as temperature rises to 7°C Temperature Length: Estimated 3 1/2 hours at 4ºC Dimensions: 146 × 105 × 70 mm. Tube capacity: 24 x 0.5, 1.5, 2.0 mL snap or screw-cap style tubes Material: Rugged Polypropylene and Inert Gel Packaging: 1 rack/unit, 5 units/case