16" BE Whirl-a-Way

I have just replaced the bearings in my BE Whirl-a-away. I took the nozzles out just to check them over as well and I found that I have an H12 in one arm and an H5. This is the only info I can find on them. They are pretty peened up and any other ID has long since disappeared. I am running a 5gal/min 3000 psi Machine. The nozzles cut very narrow track, about 15mm. I am running the wash arm as high as I can.
It would be nice if it washed a wide track. Can I put a different nozzle configuration in to achieve this.
Can anyone Identify the nozzles that I am running and suggest a different nozzle size for a wider wash path.
The machine came new with the current nozzle configuration.
 
Josh is right.
 
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