You are bidding on:(2) MH KF-011  Kevlar tanks (2) CGA-540 valves (on tank)(2) MH Regulators(2) Carrying  Bags.  These tanks are in excellent condition and in current Hydro Test.   HOWEVER, they are life limited and have expired as of Nov 2015 making them unairworthy for certified aircraft.  I'm not sure of the Legality for experimental aircraft, check before bidding.  The valves and regulars are also on excellent condition.  You can check prices on the MH website, this would cost around 2k new. Free shipping to 48 states.