Well, while there is no such claim on their packaging, it does have a familiarity there!
So far I like them a lot. They have an ease of playing and slight slickness that has me gliding up and down the neck quite easily.
It also Stays In Tune as SIT claims very well indeed.
I say if you are uncertain.....look at their price point. You won’t find a better product for 12 string guitars.
I wish I could provide a 100% approval of this product. I cannot but I can give it a 91.66 % approval.
In fact, I have just ordered 4 more complete sets for my Gretsch 5422-12 string guitar. With the addition of a .020 power wound string from another complete set, and replacing the .020 plain string for the bass 3rd string, this set sounds fantastic !
As you might have guessed I have ordered additional .020 power wound strings for my new SIT 12 string sets.
I use SIT guitar strings on all my guitars, including phosphor bronze 12 string set on my Takamine 12 string guitar