Weller 537S 23W Heater Element for Thread-On Tip<div style="text-align: left;"><strong>[Product Information]</strong><br><ul><li>Use with standard series modular iron handles 7400， 7500， 7760 and 7770</li><li>Interchangeable standard Line heaters for modular series handles and tips</li><li>Standard Line heaters from 23 to 50 watts Available</li><li>Temperature range varies from 700° F to 1100° F Based on heater wattage</li><li>Modular heaters are Available in thread-on， thread-in and integral tip designs</li></ul></div><img src="http://ecx.images-amazon.com/images/I/41W8LJ1tHEL.jpg" noproxy>