Ignitor Assembly HX JX WX HW Gas Heater - Astral Part 77185
 
DSI Igniter & Flame Sensor Electrode Assembly. 
This generates the spark and senses the flame. Used on Astral  HX & JX heaters.
 
Suits the following heaters:

Hurlcon Astralpool
HX 70
HX 120
HX 150
JX 130
JX 160
WX 70
WX 120
WX 150
 
Hurlcon HW Boilers
HW 130
HW 160
 
Mis-called the Pilot Assembly
Supplied standard with right angle rods
Is also available in the less common variant with straight rod ends – please ask for details