Jim,
most widely used treble hooks are Owner ST66 and Decoy Saltwater (not GT special 'cause they seem to break easily);
ST66 works well in 3/0 and 4/0 sizes, while 5/0 open up more often; I found the Decoy here in Italy on a shop that doesn't sell on-line and the retail price was 6 euros each
, must check japanese shops to find them (try
www.plat.co.jp with english pages).
Ciao
Alessandro
