Looking thru my stash of pen tac components I noticed 2 types of spinner blades. #1 is the "french" type marked with the size # 1st.(came size 1-5 with a 4.5 in thier too) then "Dynamic" with "pen tac seattle" at the base of the blade. The other style is a blade marked "Dingbat" which is a narrower verison which spins at a higher rpm with less drag, think this one is for summer-runs or to get deep quick in the faster water at the head of a run (size 1-3?) Glad to see some one is going to the effort to bring these components back. Though IMHO the Mor-Tac stuff is just as good.......c/22