Buck Algonquin Split Couplers available at Deep Blue Yacht Supply. All Split Couplers are made in the U.S.A, are are backed by Buck Algonquin's limited warranty. Buck Algonquin manufactures a full line of transmission split couplers for most marine transmissions. These transmission split couplers are cast from ductile iron and machined to SAE J755 specifications. Most of our split couplers are machined with our universal bolthole pattern. As well, all of our couplers are supplied with mounting hardware - Sold each