MADE BY THE SAME COMPANY THAT MAKES LINCOLN BRUSHES, EXACT SAME COMPOSITION! SAME AS OEM, 300 AMP BRUSH REPLACEMENT SET FOR LINCOLN WELDER SA-200, SA-250, (SAE-300 & SAE-400, 8 = T344 (5/8" THICK X 1-1/2" WIDE) HIGH QUALITY AND ALL USA MADE!