Pyrex 12 1/4" diameter polished sphere with ~ 80" radius.Telescope reflector good start. Make your own with this almost complete Pyrex Glass.Thickness is ~ 1.9"Weight is 16 lbs
This won't last long, Pyrex isn't available any longer to purchase for telescope mirrors.
Lower than the price of a blank, so this is a great deal.
Buy it now before it's gone, I only have this last 1.
Filed under: Eyepieces & Accessories