eBay

The brush is 4" wide. The handle and brush are 11" long. The brush is very clean. I believe I can say it is in very good used condition. The Brush handle has the old oval logo, DUPONT and very small under REG. U.S. PAT. OFF. Also stamped 35 T - 176. There is an old paper sticker that I believe is a store price sticker. It is wore and hard to read. I do see tapered.

I don't know much about paint brush bristles. Maybe Nylon ??? Very Cool Brush to display or use.

Thanks for looking and if you have any questions, just message me.