I was looking around for stainless steel plugs, inserts, caps, and what not to use for a tank mod, and I came across these...I figured I could use this around the outside of polycarbonate tubing, with a grommet on the inside for the seal.
Check it out!
	
		
			
		
		
	
			
			Check it out!
 
				
		 
 
		 
 
		 
 
		 
	 
 
		 
 
		 
	 
 
		 
 
		 
 
		 
 
		 
 
		