which ones do I get?

[1index only]

So I finally got an opportunity to try my new(used, new to me) bandsaw. Heres the thread when I got it
http://www.bt3central.com/showthread.php?t=32053

But I soon realized there were no blade guides, friend pointed out carter cool blocks but they offer two different one for sears saws and don't clarify which one fits mine....HELP

is it?
Fits Sears 12", 3/8" x 3/8" Block Size
#49H03 Price:$13.99

or is it?
Fits Old Sears, 1/4", Round Block Size
#49H06 Price:$13.99

Any advise would be good , Thank you

[AlanWS]

You should be able to look at the holders to see whether a square or round block will fit. And I have had good experience with blocks made from hard maple, with a little furniture wax on their faces. You could make some quickly with whatever you have, and use it while yopu look for other blocks. You may decide not to bother looking further.