BD Vacutainer RST Tube with Hemogard Closure (Orange) • BD Vacutainer® Rapid Serum Tube (RST) • Contains a proprietary thrombin-based medical clotting agent and a polymer gel for serum separation • Samples processed in these tubes provide a clotted specimen in 5 minutes, resulting in clear serum for quality performance • Together these can lead to increased lab efficiency and improved patient management. The speed of plasma, the quality of serum • Box of 1000