How many seals are on a 12 valve injector or o rings

There is the copper washer and oring. As well as a steel retainer ring to hold tension.

How does this look 

You're missing a piece. 

The o ring

Needs a bath

Has any heard air leak around injection pump it’s intermittent and thermostat housing won’t seal off

Ok after installing my injectors this weekend.....there is no oring. Sorry for the confusion. Too many times looking at 24v stuff.

26 minutes ago, jlbayes said:

Ok after installing my injectors this weekend.....there is no oring. Sorry for the confusion. Too many times looking at 24v stuff.

 

It's been too long since I've done 12V's to remember if they had o-rings...