This ignitor is the "narrow" style used by Trane and American Standard. The ceramic block on this ignitor is 1-1/4" wide, 1-3/16" deep, and 1/2" thick on the edge without the ridge. There is a locating ridge on the top right corner of the ceramic block when viewed from the wire end. The heating elem...

This is an O.E.M. authorized part. Fits various Trane models. OEM Part Number IGN00054. Made in United States.