Up for auction is a lot of TWO each 3.5"x 3.2mm thk Ground Glass Optical Diffusers for viewing projected images. 220 grit finely frosted S1 excellent for projected image viewing   The surface flatness is commercial polished on S2 and sides are finely frosted.  Edges are beveled to prevent chipping.  Diffuser glass substrate is a nice 3.2 mm thick!  Individually wrapped and ready for your service.  Much more durable than standard Edmund Optics at 1/10 the price.  Volume quantities available.  Your bid gets you 2 optical diffusers. 

As always, your complete satisfaction is guaranteed.  I have many happy customers and would like you to become one as well.   For more general laboratory optics such as bandpass filters, aluminum coated visible mirrors, cylindrical lenses, and achromat lenses at equally fantastic prices, please visit Sterling Resale Optics  

Winning bid to pay $4.45 shipping within USA with discounted shipping for multiple parts.  Combine with my other auction items going on now and save even more.   International bids ok but have patience with the postal system. Good Luck!!