just want to share this info. penn has this type of thrust bearing on their squall ld model, because of this it's on my list of to buy reels. check these links;
http://www.nskamericas.com/cps/rde/xchg/na_en/hs.xsl/thrust-ball-bearings.html
http://www.nskmicro.co.jp/english/products/bearing_size_pdf/size_thrust_groove.pdf
http://www.dynaroll.com/thrust-bearing-stainless.asp
tight lines...
thanks Mel