NALGENE® 5970 UnWire™ Test Tube Racks, polyketone

Unwire test tube racks have no coating that can chip or peel and permit corrosion. Excellent replacement for wire racks. Withstand most lab chemicals. They do not float in water baths. Excellent thermal properties and won’t get brittle in freezers. Full-size Unwire test tube racks securely hold a full load of test tubes or centrifuge tubes in the following popular sizes: 13, 16, 20, 25 and 30mm. Up to 72 of the smaller diameter tubes can be held at once. All sizes are molded in six bright, permanent colors. Autoclavable.

• Smooth finish leaves fewer places for contaminants to lodge; no welds to break, no sharp edges.
• Endplates accept large labels for easy identification of samples.
• Higher specific gravity than water so it stays submerged in a water bath and won't float.
• Withstands most lab chemicals and temperatures up to 121°C for a variety of lab procedures.
• Available in six bright colors to help keep samples organized.
• 15mL conical tubes fit 20mm racks; 50mL conical fit 30mm racks.
• No assembly is required; rack is ready to use.