I am selling my co2 gas bottle and the nozzle I purchased to gas my excess rats. I bought it, got it filled at the time of purchase and used it a few times and when it went empty I just never refilled it or had the need to use it again. So it was only used once. The nozzle still has the price tag on it from ****s where I purchased the bottle and the nozzle. It cost me all but 100 dollars total! I am selling it for $50! ( That's the price I paid for just the nozzle brand new!!) For more info or to inquire call/text me at 717-383-7298. Thanks, Bryan