This 24-place centrifuge has been engineered to be extremely quiet. Short runs up to 12 minutes are whisper quiet at an average of 45 dB(A). This is sufficient for centrifugation steps of most routinely used DNA/RNA purification kits. During longer runs the cooling fan works at full capacity to dissipate the heat for the remainder of the run. Centrifuge 5425 is the successor of the legendary Centrifuge 5424. It has everything you loved before plus great new features to make everyday work more enjoyable. Soft-touch, one-finger closure for ergonomic lid lockingCentrifuge 5425 Eppendorf Kit rotor (F-45-18-11-Kit) for 18 x spin columns and 1.5/2.0 mL tubes (max. 18,565 x g) This unique rotor offers a solution for a common problem when working with MiniPrep spin column kits: open tube lids that shear off during the elution step. This problem traditionally occurs because standard rotors do not provide enough support for open tube lids during centrifugation. The Eppendorf Kit rotor is designed with an extended rim that serves as a rest for tube caps during centrifugation and protects them from shearing off. Your tube lids will not tear off anymore.