DOES NOT COME WITH COMBUSTER SHOWN IN PHOTO  Photos are used to show you what the device can do
If you would like a Combustor as well let me know and i will send you a link.
The dimensions are tuned for max performance .If you want faster heat up times and the ability to burn any fuel.
This burner nozzle is made for blacksmiths and scrappers looking to forge and smelt .
Melt entire engine blocks in minutes  This device is also great for kilns. 
It uses compressed air to operate and burns any liquid fuel . This is a siphon nozzle and does not require a pump to operate .
Cranks out up to 1.9 million btu or over 570 Kw consuming about 50 LPH at that rate  . For waste oil to achieve this power you need a oil pump or you must raise the fuel tank at least 6' ft above the height  of the burner 
This device can run a propane tank at full blast at over 2 million btu
 This device needs a combustion chamber .

 

I also sell smaller nozzles 
 
See device in action
Heavy metal in waste oil are dangerous , if you use waste oil it must be outdoors or in controlled ventilation conditions 
Be safe and Good luck friends