May I know the company name which you are currently purchasing Calgaz calibration gas/accessories from?
Accessories for gas detector calibration typically include gas regulator, gas tubings.
For gas regulator, you can check the gas flow rate (liters per min) with your gas detector supplier.
We are not the gas detector supplier. Calgaz is a calibration gas manufacturer. Only gas detector supplier can advise the specifications of the gas mixture and accessories to be used with their gas detector.
Look forward to your reply.