Z326-85-A15 by Hermle / Benchmark Scientific is a 15 ml conical tube insert for the Hermle 85 ml fixed-angle rotor (Z326-85 series) on Hermle Z326 and Z306 Universal Centrifuges, sold 2 per pack. It adapts the 85 ml rotor well to accept standard 15 ml conical tubes, enabling high-speed centrifugation of smaller volumes without a rotor change.