Regretfully I must sell my four PST 104s. I have four of them for sale. Two have born dates of 87 on them and two of them have born dates of 77 on them. They are all in hydro . The 77s have very good y valves and the 87s have standard K valves with removable inserts for din fittings. I am selling each for 250 or a set for 450. I will split the shipping to you if you buy a set of them, as long as you are in the lower forty eight. All are again Pressed Steel 104s. LP 2400 tanks. I had sold a pair earlier but could not get to Florida for the delivery. These are perfect for cavern or intro to cave students. I am dealing with a hip issue and know that my 104 days are over. Sucks.