Sounds like you are talking about speedbleeders.
http://www.speedbleeder.com/

I have a set of these but have not gotten around to installing them

Todd
'88 Westy

Stephen Fry wrote:

> Quite a while ago someone was talking about the nipplets for the brakes that
> would allow you to bleed them without letting air into the brake lines. they
> had some type of one way valve built into them. If anyone has any
> information on these please email the list. I am also looking for some
> resources on Stainless Steel Brake lines. I would like to improve pedal
> pressure and since my lines are showing major signs of wear, like bubbles
> ekk, I would like to go ahead and replace them..
>
> Thanks once again
>
> Stephen