Hi-Lo UK D1 coupling pin for torch side installation assists and avoids the mix-up of the product for the different gas types. These are worldwide compatible coupling systems. 
 
Key Features: 
No mixing up by different coding of coupling pins
Prevents accidental disconnection
Coupling pin in stainless steel
Swivel nut in brass 2.0401 
 
Available in D1 | D2 | D4 in fuel gas and oxygen.