Pair. I believe these are both over half full. There's no way to measure though. Each one says it's good for about 50 balloons and I know I've not come close to filling that many. Used it once for my daughter's birthday and once for a niece's birthday. Each time filling up in the realm of 15-20 balloons

$30 for the pair Cash discount or $40 Venmo

I'm off 5400 South and just East of Bangerter. No, I won't deliver. You can bring out balloons and fill a couple to show that they have helium in them.