This 4FL filter slider accepts the standard size fluorescence filters used on all Zeiss Axio microscopes.   It can be added to any of the Axio series microscopes in the above list to expand the number of filter options.  Many of these instruments were originally delivered with a 2 or 3 position slider so adding a fourth position can expand your number of wavelengths or give you an open spot for transmitted light so you don't need to remove the entire slider each time.  If you need more than 4 colors you can add this as a second slider and change between the two.  

Original Zeiss p/n is 446425.  This is the same thing as the Chroma 91011 4FL slider.   

There are no filter sets mounted in this slider.    Any existing filter sets can be moved over.  If you are purchasing new filter sets, the filter companies will mount your filters into this slider at no charge at time of purchase.  This slider will operate exactly as intended.  There are cosmetic marks/scratches at some spots, particularly the track it slides on - this is common with these parts and has no effect on the performance or use.  All of the filter retaining rings are included.  Tested and certified on AxioVert 135 stand.  

All of our used parts are thoroughly cleaned, refurbished and tested by our knowledgeable staff and your satisfaction is guaranteed.  We offer no questions asked returns for 7 days after receipt (less cost of shipping).  All used items carry a 90 day warranty against defects which will be honored with a full refund or replacement with like item.  If you have any questions or would like additional photographs, please email us at sales@hitechinstruments.com.  If you do not see the item you are looking for please email us as many times we have inventory we have not yet listed online.