If you need a Bioplast CO2 Low Pressure Gauge we suggest you purchase all that you can. They are discontinued and we only have a few of these left over from the old Bioplast German CO2 Systems. Part #70530
They may fit other CO2 systems but do this at your own discretion. You may eventually want to update your system but we know how aggravating it can be to completely overhaul a system that has been working for you.