15' channel balance

Hi! Your balance looks similar to our S380-15. This comes with a 19-005 top and 15-005 bottom nylon fitting. The bottom fitting is particular in that it's 1" deep. As long as both fittings match yours, then I think this is your best option.

I'd also go with the 1420 option, when prompted. This should be the equivalent of your old 14B stamp.