Listing is for a set of 4 Bosch Duraterm Glow-Plugs for the Ford Models shown below.
It is a guide only
Please use the Bosch online catalogue to verify. 
This can be accessed at 
www.bosch-automotive-catalog.com/en/vehicle-search?country=GB

please take note of chassis numbers etc., even though the guide is pretty accurate,
double checking saves time, work and postage costs so is well worth the small effort.
The pictures are of some of the plugs on offer not stock images.
I've lowered the price on these as this is the last set, the 3rd and 4th pics are of the plugs you will receive, please note the marker etc. it doesn't affect the plugs in any way ( or your rights ).
Specs:
connection M4, Width across flats 10mm, Length 98 mm, Installation depth 25 mm, Thread M10 x 1 , voltage 11 V, Taper angle 93 °, Tightening torque from 10Nm to 15Nm

O.E Comparison numbers 
Ford XS4U 6M090 AB   Finnis 1079401

Application Guide Only, Please check using the e-cat shown above as I may have missed something.

FORD  C-MAX MPV 1.8 TDCi 85kW / 115 HP 02/07 - 09/10
FORD FIESTA Hatchback 1.8 DI 55kW / 74 HP 04/00 - 01/02
FORD FIESTA Box 1.8 DI 55kW / 74 HP 09/00 - 08/03
FORD FIESTA Box TD 1.8 55kW / 74 HP 03/00 - 08/03
FORD FOCUS Estate 1.8 DI / TDDi 55kW / 74 HP 08/99 - 11/04
FORD FOCUS Hatchback 1.8 DI / TDDi 55kW / 74 HP 08/99 - 11/04
FORD FOCUS Hatchback 1.8 TDCi 85kW / 115 HP 01/05 - 09/12
FORD FOCUS Estate 1.8 TDCi 85kW / 115 HP 03/01 - 11/04
FORD FOCUS Hatchback 1.8 TDCi 85kW / 115 HP 03/01 - 11/04
FORD FOCUS Saloon 1.8 TDCi 85kW / 115 HP 03/01 - 11/04
FORD FOCUS Saloon 1.8 TDCi 85kW / 115 HP 04/05 - 09/12
FORD FOCUS Estate 1.8 TDCi 74kW / 100 HP 08/02 - 11/04
FORD FOCUS Hatchback 1.8 TDCi 74kW / 100 HP 08/02 - 11/04
FORD FOCUS Saloon 1.8 TDCi 74kW / 100 HP 08/02 - 11/04
FORD FOCUS Estate 1.8 TDCi 85kW / 115 HP 11/04 - 01/08
FORD FOCUS Estate 1.8 Turbo DI / TDDi 66kW / 89 HP 02/99 - 11/04
FORD FOCUS Saloon 1.8 Turbo DI / TDDi 66kW / 89 HP 02/99 - 11/04
FORD FOCUS Saloon 1.8 Turbo DI / TDDi 55kW / 74 HP 08/01 - 03/05
FORD FOCUS Hatchback 1.8 Turbo DI / TDDi 66kW / 89 HP 10/98 - 11/04
FORD FOCUS  C-MAX MPV 1.8 TDCi 85kW / 115 HP 01/05 - 03/07
FORD GALAXY MPV 1.8 TDCi 74kW / 100 HP 05/06 and Onward
FORD GALAXY MPV 1.8 TDCi 92kW / 123 HP 05/06 and  Onward
FORD MONDEO Hatchback 1.8 TDCi 74kW / 100 HP 03/07 - 09/14
FORD MONDEO Saloon 1.8 TDCi 74kW / 100 HP 03/07 - 09/14
FORD MONDEO Estate 1.8 TDCi 74kW / 100 HP 03/07 - 12/12
FORD MONDEO Hatchback 1.8 TDCi 92kW / 123 HP 06/07 and  Onward
FORD MONDEO Saloon 1.8 TDCi 92kW / 123 HP 06/07 - 09/14
FORD MONDEO Estate 1.8 TDCi 92kW / 123 HP 06/07 - 12/12
FORD S-MAX MPV 1.8 TDCi 74kW / 100 HP 01/07 and Onward
FORD S-MAX MPV 1.8 TDCi 92kW / 123 HP 05/06 and Onward
FORD TOURNEO CONNECT MPV 1.8 TDCi 66kW / 89 HP 06/02 - 12/13
FORD TOURNEO CONNECT MPV 1.8 TDCi 81kW / 108 HP 08/06 - 12/13
FORD TOURNEO CONNECT MPV 1.8 TDCi /TDDi /DI 55kW / 74 HP 06/02 - 12/13
FORD TRANSIT CONNECT Box 1.8 Di 55kW / 74 HP 06/02 - 12/13
FORD TRANSIT CONNECT Box 1.8 TDCi 66kW / 89 HP 06/02 - 12/13
FORD TRANSIT CONNECT Box 1.8 TDCi 81kW / 108 HP 08/06 - 12/13
FORD TRANSIT TOURNEO Bus 2.2 TDCi 81kW / 108 HP 07/06 - 08/14
FORD TRANSIT TOURNEO Bus 2.2 TDCi 96kW / 129 HP 07/06 - 08/14