Flux brush, horsehair and tin, stiff bristle, 6 x 3/8 inches. Sold

Horse Hair Paint Brush

Acid Brushes

Airgas - RAD64000457 - RADNOR™ 3/8 X 3/4 Horsehair Acid And Flux Brush With Tin Handle

HDX Acid Brushes (3-Piece) 80-721-111 - The Home Depot

HDX Acid Brushes (3-Piece) 80-721-111 - The Home Depot

Magnolia Brush 455-2A Tin Handle Horsehair Bristle Acid Brush, 0.5

Gordon Brush

Flux, Canfield Blu-Glass™, low fume. Sold per 8-ounce bottle. - Fire Mountain Gems and Beads

Ram-Pro Pack of 36 Disposable Brushes. Specs: 5-¼” Tubular Metal Handle - 7/8” long by 3/8” wide Horsehair Tight Bristles - with 3/8” Ferrule

Acid Brushes - 36 Count 3/8 Inch Horsehair Acid Flux Brushes, Disposable Glue Brushes for Woodworking, Epoxy Brushes for Resin, Great for Crafting

Commercial Brush Fillings

Dixcel® Brass Scratch Brush with Plastic Handle