Buck Algonquin Solid Couplers available at Deep Blue Yacht Supply. All Solid 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 solid couplers for most marine transmissions. Buck solid couplers are cast from ductile iron and machined to SAE J755 specifications. Most of Buck Algonquin couplers are machined with our universal bolthole pattern. As well, all solid transmission couplers are supplied with mounting hardware - Sold each