Couldn't tell ya exactly which one it was warbeaver, but you will need 2 packs of those anyways. The feed and return lines have 2 o-rings in each, and one line is large with 2 larger o-rings and one line is small with 2 smaller o-rings. And since one pack has only one large and one small, so you need 2 packs.
You wont see the o-rings inside unless you get a bright flashlight inside the connector. Even then, youll barely see brown and yellow, since there is a black and white retainer holding the o-rings in. The retainer is the closest thing to the opening.
It is recommended to use a small o-ring pick, but i managed using a tiny flat bladed screwdriver. I was very careful.
