This is a brand new SHIELDS marine Exhaust hose connector designed to be used with metal or fiberglass exhaust systems.  

Shield #116-220-5000K

It is 5" ID and has a single hump in the center for making mild turn or adjustments between mufflers, or tube/pipe or similar.  This includes 4 of the T bolts for exhaust #720-5000 from shields marine. 

The Dimensions are 5" ID x 6" long.  Shields number on the hump hose alone is 220-5000.

West Marine sells this item for $75.00 each.