MoRich is the only company that uses cores with the same specs as in heavier balls in their 13 lb balls. The density of the core is modified to make the lighter weight, but the specs are the same. Other companies go to a "generic" core in their 13 lb balls and to a pancake below 13 lb. -- JohnP
Edit, 2/4/11 -- I should have said that other companies go to a generic core below 12 lbs instead of below 13 lbs. I don't think MoRich makes any balls lighter than 13 lbs.-- JohnP
Edited by JohnP on 2/4/2011 at 4:10 PM