Lot of 8 new metal stepdown adaptors to mount 32mm mount diameter monocular microscope bodies to standard microscope stands with racks accepting 83mm microscope bodies.  Units measure overall 9cm x 2cm thick; the mount diameter is 83mm, with the center hole at 32mm.  Set screw included.    

Shipping $16 in contl US. Paypal preferred. CA residents add 7.75% sales tax.