DOW #259200 Barbed Brass Dispensing Nozzle / Gun Tip. Fits PRO-13 / PRO-14 Foam Gun Tools. Barbed Tip allows use of plastic extension straws. DOW #259200 Barbed Brass Dispensing Nozzle / Gun Tip. Fits PRO-13 / PRO-14 Foam Gun Tools. Barbed Tip allows use of plastic extension straws.