These are origianl US GI WWII issue 20mm bore brushes, sealed in pacs of 5 brushes. As a bore bush good for everything from 15mm Besa, 20mms, and even will work on Russian 23mm, also good for the mortar sub caliber barrels.. These are also great as chamber brushes for Short 50, Boyes 55, Cal..50, Russian 12.7mm and even for 12 guage shotguns that have been allowed to really lead up. Also available in sealed boxes of 25 brushes, five of these pacs.
