Brake or Clutch spring?

I'm pretty sure that is the spring to hold your jack down in the trunk .. There is no spring on the brake pedal .. That is pushed back by the master cylinder ..
Okay, good enough. Thanks for the response. Must’ve gotten tossed in the wrong box. Do you know if the rod gets ‘clicked in’ the master cylinder with the rubber around the rod? I’m just wondering cause you can lift up on the pedal right now (not seated), and seems as if the rod could fall out. That’s why I wondered about the spring originally. Thx