Touren 4ml Serum Separator Tubes (SST) with Gel deliver rapid serum isolation, maximum sample stability, and precise vacuum blood collection for routine clinical chemistry, immunology, and serology diagnostics. Pre-evacuated to draw an exact 4.0ml volume, these professional-grade tubes feature an advanced inert polymer barrier gel paired with a micronized silica clot activator. During centrifugation, the dense gel migrates upward to form a solid physical barrier between the serum and the cellular clot, completely eliminating substance exchange to protect analyte stability.
