Skirted, self-standing tubes with a conical bottom Graduated at 1.0mL intervals and feature a large frosted writing area Caps fit tubes securely for a leakproof seal Sterile tubes come with caps attached 10mL centrifuge tube, polypropylene (PP) with screw cap and printed graduations Dimensions: 16 x 100mm Available in non-sterile and sterile packaging White graduation marks and writing area