Z366-250-B10 by Hermle is a 2-pack of 12 × 10 ml conical tube inserts for the Hermle Z366-250-HC High-Capacity Swing-Out Rotor. Two packs fill all four bucket positions for a total run capacity of 48 × 10 ml tubes at up to 4,500 rpm / 3,735 × g in the Hermle Z366 and Z366K centrifuge series.