Chrome replacement alternator plugs to suite all Laro-Hunter and many Honda's, Suzuki's, Kawasaki's and Yamaha motorcycles.  The large plug uses a 10mm allen key to fit and the small plug uses a screwdriver to install. The diameter of the head of the large plug is 38mm and the smaller one is 22mm in diameter.
The small plug has the o'ring included and the large one it is not included.
NOTE: only sold as a pair.