This regulator features a 6.35mm duotight compatible barb, meaning you can connect just about anything within a matter of seconds.

Suitable Gas Cartridges are:
10 Pack 16g Cartridge / Bulbs
74g Big Bulb CO2 Cartridge 5/8-18UNF Thread

To use the Mini duotight Regulator with threaded (not QD) Sodastream cylinders you will need the optional Deluxe Sodastream Cylinder Adaptor for Mini duotight Regulator.

This Mini duotight Regulator also will work on conventional larger CO2 Cylinders with Type 30 Thread. So if you wanted to connect this regulator to your 2.6kg or 6kg CO2 cylinder then you can a Type 30 Adaptor for Mini duotight Regulators.
 
Please note, once you get liquid shoot back through it, it's no longer functional. Be extremely careful with overfilling your kegs or tipping them over when the gas has run out.

This regulator is capped at dispensing 30psi to ensure you do not accidentally over carbonate or exceed your kegs pressure rating. The gauge however shows up to 60psi just in case by heat ingress / expansion that it does not break the gauge.