Wintrobe ESR Tubes are Precision-drawn, Round-bottom Glass Tubes

Designed for Erythrocyte Sedimentation Rate (ESR) procedures in laboratory and clinical settings. Each tube features clearly printed red calibration markings that deliver reliable, easy-to-read results, ensuring consistent performance across every test run.

Manufactured to meet the dimensional specifications of the Wintrobe method, these tubes measure 1mm internal diameter x 115mm in length — the recognized standard for this procedure. The uniform, precision-drawn glass walls provide consistent bore geometry, which supports repeatable volumetric accuracy from tube to tube.

The round-bottom design facilitates complete sedimentation of red blood cells and is compatible with standard Wintrobe ESR racks and centrifuge holders. The vivid red calibration scale printed on the exterior provides clear, glare-resistant readings under typical laboratory lighting conditions.

Suitable for use in hematology laboratories, hospital clinical labs, research facilities, medical schools, and quality-control environments where standard Wintrobe sedimentation testing is performed. Supplied in a pack of 200 tubes, this quantity supports extended workflow without frequent reordering.

Product Specifications:

• Material: Borosilicate Glass
• Internal Diameter (I.D.): 1mm (0.039in)
• Length: 115mm (4.53in)
• Bottom Style: Round Bottom
• Calibration Color: Red

Package Includes:

200 Wintrobe ESR Tubes per Pack