Wizard Nozzle Mix Machine Cutting Blowpipe  2 x M12 1.5mm Inlet Connections - To Suit The Straight Line Tractor 

This is a replacement machine cutting blowpipe for early versions of the Wizard cutting tractor which is typically used on a simple track for straight line cutting.
The machine cutting torch barrel diameter is 32 mm with a barrel length of 145mm.   Brass valve block plus a brass head stock coupled with gas supply tubes which are covered by the brass tube or torch "barrel". 
Should a replacement torch rack be required these are available to fit to the torch barrel.  Item No. PA5104
The machine cutting torch has a standard three seat nozzle mixing seat configuration which suits ANM / PNM /ANME / PNME and AGNM or PGNM when used for "J" edge plate preparation. 

Inlet connections are M12 x 1.5 right hand and left hand for the fuel gas connection, the oxygen inlet connection is split between the pre-heat and cutting oxygen. 
The cutting oxygen valve has a quck action turn to allow the full flow of cutting oxygen to be achieved within half a turn.
Note on these early machines the inlet manifold block has G3/8 inlet connections and the M12 outlet connections - the manifold block did not have the quick shut off valve fitted to the later machines.

A simple check is to take a G1/4 nut and screw the nut to the manifold and torch threads - nut only no nipple - the G1/4 nut will thread onto the M12 connection thread but the G1/4 nut will be very "wobbly" and loose.  Thread the G1/4 nut onto a known G1/4 thread and you will establish the difference.