Get from Amazon : http://www.amazon.com/gp/product/B005C883A4?tag=wayofcats-20 <br /> <br />AmScope PZK Simple Polarizing Kit for Compound Microscopes Graduated Round Stage 1-1/8 Lens <br /> <br />Polarizing kit provides polarization features for compound microscopes <br />Rectangular base with graduated round stage can be rotated to change the direction from which the light hits the specimen <br />516 8mm observation hole for use with standard objectives <br />Comes with rectangular plate with graduated round stage and a polarizing lens :
