Replacement Extender Sensor Cap for Barkless Pro BP-504

It fit right onto the BP-504 without any fiddling, and the longer reach finally makes contact through my husky’s thick neck fur instead of just sitting on top of it. The sensor cap feels sturdy enough that I don’t worry about it snapping off during zoomies, and the correction is consistent again.

My collie has a double coat that always blocked the old sensor cap, so this extender is exactly what I needed—it sits flush against the skin now and the collar actually picks up every bark. Took about two minutes to swap out and the fit is snug enough that it hasn’t shifted once during our morning r

My husky has thick fur and the sensor wasn't making good contact before, but this cap snaps on easily and now the collar actually stops the barking. Worth every penny if your dog's a fluffball like mine.