360mm blade question

[DOG]

Hey all, I'm getting ready to order RJX blades for my Gaui X3. Can someone explain what is the differences between this http://www.anythingheli.com/rjx-360mm-e ... b-surface/ and this http://www.anythingheli.com/rjx-360mm-e ... trex-450l/ beside the price? What's is "B-surface" I did notice that. Thanks in advance.

[pvolcko]

B-surface are going to have blemishes. They usually cost less but are just as functional.

[DOG]

Thank you Paul for that. I don't mind saving some money.