
Z446-750-A250 by Hermle is a 2-pack of flat bottle inserts that convert the 750 ml Hermle Z446-750 swing-out rotor buckets for 250 ml flat-bottom centrifuge bottles, rated to 4,000 RPM and 3,434 × g on the Z446 (4,500 RPM / 4,346 × g on the Z446-K) — order at mbpinc.net/quickorder using catalog number Z446-750-A250.