This interchangeable 12-channel manifold can be used on any Eppendorf® Research® multichannel pipettor (P7594-1 through P7594-6). This 12-channel manifold is most commonly used to convert an 8-channel model to an 12-channel model. This makes the Research® multichannel pipettor very versatile and more economical to own without having to buy a completely new unit. The autoclavable lower manifold has an adjustable volume setting of 30 to 300µL. Number Of Channels: 12. Pipette Tip Size: 300µL. Eppendorf® #: 022453980.