This auction is for a used EXTRA SMALL 5 1/2" long tank, new Robart air control valve, line and extras for air retracts for R/C model airplanes. $5.50 shipping U.S. $15.00 shipping Canada. $20.00 International shipping for all other countries. I combine auctions to save you money on shipping. I am clearing out a massive estate with lots of new and lightly used gas, glow, diesel, 2-stroke, 4-stroke, single and multi cylinder engines, tether cars, old radio gear, RTF airplanes and vehicles, and lots of new parts along with used and parts engines so stay tuned to our future auctions.