E-Tac Hose/Air Adapter Pack...what is this?

[p_aint_fun]

I just saw this on the AGD web site under the E-Tac special. Just wondering what it is.

[Tunaman]

I just saw this on the AGD web site under the E-Tac special. Just wondering what it is.The Tac One doesn't come with airlines or an ASA so that is what they are offering you...