Chris Geiger is a regular in this section and he says the brake lines from All Pro have an external plastic shrink wrap over the braided SS. The MAF lines do not have the external coating. Check out: http://www.allprooffroad.com/brake.html
A by-product of the SS brake lines is a significant improvement in pedal feel. You'll want to do a full brake system flush with new Valvoline synthetic when you put on the new brake lines.