This is a Brand New Carrier/Bryant/Payne Gas Furnace Ignitor. It an OEM replacement for the part #s listed below. The ceramic base is 2" wide and it is roughly 3" from the tip of the ignitor to the bottom of the ceramic base. Simply unplug your and plug this one in. Thanks for looking and good luck!
The purpose of an ignitor is to ignite the gas after the gas valve opens up. It most cases, the ignitor turns off after ignition has occurred.
271M 0828 HSI