flymo easi trim EHT 530?

while replacing the new flex on the trimmer i accidentley broke
the small grey square plastic risistor type thing with two wires comming from it what is it called and where do you bye them
flymo easi trim e h t 530. A/ 1.40.00 Mk TX2
this is what is printed on the grey plastic part .!uF m 275 Vcc