It comes with a 3/8″ tip. Other tips are available, including 600 or 800 degree tips. This give you options for hotter or cooler iron by switching the tips.
One of the best soldering irons for stained glass is the Weller 100 watt temperature controlled iron. This high quality soldering iron maintains a constant 700 degree, cycling on and off automatically eliminating the need for a separate iron controller.