4 plan microscope objective to Nikon F-mount

This is the spacer needed to attach this objective

https://www.amazon.com/AmScope-Plan-Achromatic-Objective-Knurled/dp/B01G4CCGRC/

to a Nikon F-mount camera. Lets you take 4x macro pictures.

to read a review of the objective check here...

https://www.closeuphotography.com/seventeen-dollar-plan-4x-objective/

I have a newer design for crop nikons: https://www.prusaprinters.org/prints/91071-dx-nikon-microscope-adapter-275x-and-4x