PowerWeld Light Duty Oxygen Regulator - 313OX Brand_Fronius Stop and Clamping Square 300

Stop and Clamping Square 300 G (Nitrided)

They’re practically indestructible and are 70% stronger than the competitive u-shaped styles

The dimensions of the flat bar in use are 30x14mm

You can either buy the switch on it's own and rig it up for yourself

CK Worldwide 2PCA (45V11)

PowerWeld Light Duty Oxygen Regulator - 313OX Brand_Fronius Stop and Clamping Square 300Powerweld Light Duty Oxygen Regulator Simple, economical oxygen regulator. Connects to oxygen cylinder at rear of regulator. Features: Maximum inlet pressure: 3000 PSI Delivery pressure: 5 80 PSI CGA 540 Inlet connection 9 16" 18RH (M) Outlet connection 2" Gauges