B1401018S factory original ignitor. 

                            $31.43 EACH WHEN
                        PURCHASED in a 2 PAK!!
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Factory original igniter for B1401018S and B1401015 model
ignitors.  Also  for GMP, GMPN, GMPH, GMPE, GSMS,
GSM and GPD models as well as Modine brand 5H075032B.
Includes mounting bracket and 2 screws. 5.5" leads with
connector.

Also Fits GDT, GDT045-3, GDT045-3A, GDT070-3,
GDT070-3A, GDT090-4, GDT090-4A, GDT115-5, GDT115-5A,
GMN, GMN060-3, GMN080-4, GMN100-4, GMN120-5, GMNT,
GMNT040-3, GMNT060-3, GMNT080-4, GMNT100-4,
GMNT120-5, GMP, GMP050-3, GMP075-3, GMP075-4,
GMP100-3, GMP100-4, GMP100-5, GMP125-4, GMP125-5,
GMP150-5, GMPE, GMPE075-3, GMPE075-3A, GMPE100-4,
GMPE100-4A, GMPE125-5, GMPE125-5A, GMPH, GMPH050-3,
GMPH075-4, GMPH080-5, GMPH120-5, GMPN, GMPN040-3,
GMPN060-3, GMPN080-4, GMPN100-4, GMPN120-5, GMPV,
GMPV075-1.5, GMPV075-3, GMPV100-3, GMPV100-5,
GMPV125-3, GMPV125-5, GMT, GMT045-3, GMT045-3A,
GMT070-3, GMT070-3A, GMT070-4, GMT070-4A, GMT090-3,
GMT090-3A, GMT090-4, GMT090-4A, GMT090-5A, GMT115-5,
GMT115-5A, GMT135-5, GMT140-5, GMT140-5A, GMTH,
GMTH045-3, GMTH045-3A, GMTH070-4, GMTH070-4A,
GMTH090-5, GMTH090-5A, GMTH115-5, GPD, GPD050-3,
GPD075-3, GPD100-4, GPD125-4, GSM, GSM060-3, GSM080-4,
GSM100-4, GSMS, GSMS060-3, GSMS080-4, GSMS100-4, GUS,
GUS050-2, GUS075-3, GUS100-4, GUS125-5

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IMPORTANT NOTE: The number shown on the tag attached
to the wires of the ignitor may have been put on everal very
different looking ignitors.  Please check the picture to confirm
this item is what you are looking for. You'll need to especially
pay extra attention to the porcelain base. The Black Silicone
ignitor tip maybe as shown or the current replacement version.