Z327-200-A57 by Benchmark Scientific (Hermle) is a pack of 2 inserts, each holding 8 x 1.8–7 ml blood collection tubes, designed for the Z327-200-BUK swing-out rotor on Hermle Z307 and Z327 Universal Centrifuges. These inserts support standard Vacutainer and Vacuette formats for serum, plasma, and coagulation sample processing.