I have available 1 set (2 items) of Rom Air - Mains Retracts. These's units are New (Un-Used) Air actuated Mains retract units, that would be suitable for RC Aircraft up to 6kg's or there about. These units were among a number spares that I've collected over the years, but as I'm no-longer active in the hobbie, I'm putting them up for sale. . Note;- I'm offering them @ $100.00 per pair. Postage within Australia @ $18.00 For additional details, please contact me.