saw a thread here a few weeks ago about these blades.
Called the St Louis distributor and was sent 2 to try.
7 degree 7/8 pitch .042.
Got 900 bf out of the first, but about the last 100 ft or so was past what I should have done as it was somewhat dull.
Sawed Hemlock.
Sawed another 400 ft with the second one and am now out of logs with the blade still in good shape.
WAs quoted $14.47 per blade plus shipping.
The fellow in St L gave me the phone # of a distributor 25 miles from me so may be able to get them there if i decide to buy more.
IMO a good bang for the buck.
Have a great memorial weekend
Pete