1994 Volvo 850 Base 2.4L PCV system hose name
 

One of the hoses to the oil separator snapped so I need to get a new one but I don't know the name of it. Can anyone help me? Also, should I replace that and the oil separator or should I purchase the whole kit and get all new components? I'm trying to not spend a ton of money since my budget is small and I pretty much know next to nothing when it comes to volvos. I'm trying to fix the rough idle.
https://cimg4.ibsrv.net/gimg/volvofo...aec6764eeb.jpg