Up for sale are six empty air conditioner / refrigerator freon recycling recovery tanks. I believe these are 30 pound and 50 pound lb tanks. I am asking $40 for each 30 lb tank and $60 for each 50 lb tank, these cost $100-$150 new. These are most likely out of date and will need to be recertified. The white tank marked 134a was retested in 2011, and the other two in 1999 and 1997. These come from an estate, I do not know the history of them. If the ad is up, the item is still available. Only serious buyers and reasonable offers please. If interested, please respond with a phone number I can reach you at. Be sure to click the "More Ads By This User" box to check out my other ads for more items that I have for sale.