These brass powder horn base plugs are designed to be installed in the base (large end) of the powder horn. The decorative plug provides a removable plug for easy filling of the horn and a place to tie one end of the horn lanyard. The plug comes with a brass bushing that is permanently installed in the horn base. These plugs are available in two sizes. The Large one is 1″ in diameter with a 1/2″- 20 thread; the small one is 5/8″ in diameter with a 3/8″-24 thread.