Defrost hose question...

The port on the heater box for the drivers side measures pretty close to 2 and 1/8 give or take a bit. The hose will slip over that and actually stay on the port. The factory used a clip that attached to the inside of the hose and had a outside grip that grabbed the outside of the port. I don't use them because they are a pain to get off the heater box if you ever want to remove the hose and then you run the risk of tearing the hose. They have some barbs that really bite into the box and also the hose. Those original hoses were pretty thin almost paper like material and you could tear them pretty easy. The passenger side port is the smaller of the two and that hose is just 2 inch inside diameter. I have a spare one of those that's NOS if anyone is looking for the factory replacement.