12.5" Dall-Kirkham primary: Pyrex, 62.125"f.l., 2" thick, 2-5/16" center hole. Paint masked outer 1/2". Last used as an F5 Newtonian. Coated, but had previous surface etching from exposure to the elements prior to coating, so the surface is a bit pitted. Use for your low-budget Cass project / fine grind and repolish for Newtonian or other use. $50 plus shipping in CONUS. Sorry, no Paypal. Money order perferred, or cleared personal check.