Opinions on wheel cylinders, please

[Sunliner]

Ok gang,
Had a leaking wheel cylinder on my '97 Blazer LS. Decided to go ahead & do both of them.
Bought a set of NAPA Tru-stop wheel cylinders. 1st one's fine...but AFTER I got the other one on, I realized there is a small tear on the cap on the end, right around the edge.
I understand that defects can happen to any product, but before I pull this thing off again & replace, what do you guys think about wheel cylinders as far as brands?
Are Tru-stops junk, or did I just get a bad one?

thanks!
-Mike

[Fireplug]

never had any problems with NAPA parts