Polypropylene rack is steam autoclavable at 121°C (250°F). Dimensions: 21cm x 11cm x 22cm H (8 3/8" x 4 ½" x 8 ¾"). Rugged and stable polypropylene rack is made specifically to support and safely store Nuclear Magnetic Resonance tubes. Upper deck has holes; lower deck has hemispherical wells to protect tip. Handle in end plates for easy transport. Tube size: 5 mm O.D. x 178 mm long. Places: 72.