I purchased 2 drip tips in the classies.  
The one in the middle is a stainless steel drip tip and does not fit into any cartos (boge or smoketech) that i have or atties either.
See how the other 2 that I already own, on either side, are smaller in diameter/circumference? Those are normal sized 510 drip tips.
		
		
	
	
		 
	
		 
	
Here they are laying side by side:
		 
	
It is actually the "same" diameter of a carto.....so what the heck does this fit on?
What is it for? Nice heavy SS drip tip but I probably should pass it on once I figure out what you use it for. The roughness on the bottom is numbers, not roughness.
Hope I learn something here.
	
		
			
		
		
	
			
			The one in the middle is a stainless steel drip tip and does not fit into any cartos (boge or smoketech) that i have or atties either.
See how the other 2 that I already own, on either side, are smaller in diameter/circumference? Those are normal sized 510 drip tips.
 
	 
	Here they are laying side by side:
 
	It is actually the "same" diameter of a carto.....so what the heck does this fit on?
What is it for? Nice heavy SS drip tip but I probably should pass it on once I figure out what you use it for. The roughness on the bottom is numbers, not roughness.
Hope I learn something here.
 
				
		 
 
		 
 
		 
 
		 
	 
 
		
 
 
		 
 
		 
 
		 
	 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		 
 
		