100mm wide BD ascension's with the ?quick clip? not sure of the name tail connection. The front of the skins have a metal rectangular loop which hooks over the tip of the ski. The tail has a metal cam type plate which can be hooked onto the tail of the ski.
I use Ascension skis with the "euro" rubber tip. It's a little tough to fit the tip's wire bail over the G4's ski tip cover. I'm thinking of grinding down the tip cover to make it easier to put on. I think I also will file a groove in the tail to center the tail hook. K2 does this with the telemark skis.