/Pezon & Michel Super Parabolic PPP Progressive .@/64inchI@inch@$@.@4@9@>@A@D@F@I@K@N@@P@Q@R@T@U@V@W@Y@@Z@[@\@^@@_@@`@`@a@ b@b@`c@d@d@@e@inch+?K?V-?Mb??5^I ?+?jt?Gz?|?5^?zG?v/?h|?5?X9v?rh|?x&1?Pn?NbX9?L7A`?inchmm33333a@QX@@>@grainsgrainsfeetx?ounce @grains@~jt?K7A`?oz / cubic inch)wY?Q?F`g?Ζʕ͓h̒l,eBbvƃobg̒ႤieBbvjbh,http://www.uwm.edu/~stetzer/Tapers/hexrod-archive.html