One of the things that needs to be clarified here is the fact that the length of the tapered nylon braid is 3 feet shorter than the leader length being stated. Another thing is that the braid is gray in color, so high visibility is not an option with the Orvis braided Leaders.
At one time Airflow also offered braided leaders in floating and intermediate sink rates that were white or clear, depending on how you view such things, in color. One of the braided leaders I cast yesterday was one of those and it was in the longer length. They were available in light trout, trout and salmon weights -20, 25 & 30 pound breaking strength butts, as were the earlier Orvis Braided Leaders that are now topping out at a 7 weight line compatible butt section, in various appropriate lengths. Unfortunately, at least as far as I was able to determine, the Airflow braided leaders are no longer being made. Although you might be able to still find some around somewhere on a rack in a fly fishing shop. Here is a link for an alternative source of more visible braided leader butts at a much better price than what Orvis is charging for their Braided Leaders, but in a very limited quantity: http://www.ebay.com/itm/6ft-BRAIDED-fly-fishing-LEADER-Salmon-Bass-Pike-Big-Game-Taper-30lb-test-/270951876188
Here is another source for more visible Braided Leaders still being made today; unfortunately this is for wholesale to dealers firm setup, the minimum buy quantity is 50 leaders, so it is not for the average angler: http://factory.dhgate.com/fishing-lines/fly-fishing-line-braided-leader-p48137537.html
The only reason I am posting this is in case Daniel, Chris or Jason might be interested in adding them to their product lines.
Braided Leaders have a loop in each end of the braided section. All one needs to do is loop the butt end to the fly line (or girth hitch to the lillian on a T-rod) and loop the other end to the Tippet (which is not braided). The same braided section will roll over a size 2 streamer or a size 20 dry; just change the tippet to match the fly.
Some Additional Information:
7 1/2' Length Braided Leader
Short (3-1/2 ft.) braided tapered butt section for 7-ft. leaders. Short length turns over easily. Fly stays close to line when using sinking lines. Accurate casting.
9' Length Braided Leader
Medium (5-ft.) braided tapered butt section for 9-ft. leaders. Good general length. Allows sinking flies to sink deeper, quicker.
12' Length Braided Leader
Long (8-ft.) braided tapered butt section for 12-ft. leaders. Good for longer dead drifts. Allows sinking flies to sink deeper, quicker.
Easy to use. They do it all—long casts, short casts; dry flies and emergers at the surface; nymphs, wets, and streamers scratching the bottom. Change from short to long leaders, sinking to fast sinking to floating leaders without tying anything harder than a loop. Available in a kit which contains spare loops for your line, mini-lead-heads, tippets and a wallet. Long life
Tend to spray water unless you buy the "filled" braid or unless you fill the braid with fly floatant.