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				 From what I have seen..... 
 
			
			They are all rubber and only on cab 13 not 11 or 12.
 I would go for the 5 hole one..... cheaper and you will no doubt have some other wire(s) to pull through the fifth hole.
 
 cheers
 
				__________________Bob Carriere....B.T.B
 C15a Cab 11
 Hammond, Ontario
 Canada
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