New Old Stock  5 pieces : EDMUND SCIENTIFIC FRONT  SURFACE MIRRORS 7  9/16" x 3 " x 1/8" thick each. Mirrors will be SHIPPED FREE as a pack of 5 pieces. Each individual mirror weighs 3.8 ounces. A pack of 5 weighs 1 pound 3 ounces and given their heaviness as well  as the optical quality, indicates these are made from quartz glass.  I lived near Edmund Scientific in Barrington,  NJ before I  moved to Delaware in 2006.  Over the years I would frequently go to  their retail store and buy various glass components and other items that I used in my electronic designs starting in the early 1980's. When they closed their retail store back around 2000, I went crazy as they marked down lots of items at prices too  good to pass up. I used many of these  7 9/16" x 3" front surface mirrors to  make amazing Kaleidoscopes,  and the effects using front surface mirrors of this size are dazzling and beyond incredible. Now almost twenty five years later I still have a very big box of them sitting on my shelf,  so time to finally let go!   Each set of 5 glass front surface mirrors comes wrapped in their original tissue.   Edmund's prices today on similar but smaller mirrors are in the $100's of dollars each, amazing! When these are gone they are gone forever!  Photos of front surface mirrors are hard to make ,  but these are of the best I could do! Will be packed securely to assure undamaged arrival. 100% money back guarantee if not completely satisfied and FREE SHIPPING!!!!.