Fits the NOVA 46300 Comet II Midi Lathe. This unit enables the spindle length of the NOVA 46000 Comet II Lathe to be expanded. Each extension adds 23.4? in length to the lathe (the standard NOVA 46000 Comet II Midi Lathe lathe comes with 16.5? between center length) Made from solid cast iron for long life and maximum strength and rigidity.