AES Industries 1/2" Acid Brushes - Made in USA (144pc) Economical - great for one-time or repeat use in acid, glue, paste, soldering, touch-up, applying zinc primer, dusting, or other general-purpose applications Great for brushing seam sealer in auto body applications 144pc Brushes feature 100% pure black horsehair bristles and strong metal ferrules 1/2" bristle width, 3/4" trim (bristle length), 6" total brush length Acid brushes proudly Made in USA