There's nowhere listed essential head weights. I even tried to ask them by the app's chat feature but got no response at all. They read my question but didn't' answer.. However, I ordered one (6 wt) and here are my measurements: The orange part 17.2 g and about 21 g including the rear taper. According to brief first tests the line itself feels pretty good for my 7 wt rod. I thought it would be heavy (for spey casts) but surprisingly it doesn't. Perhaps it is because of the weight distribution.
Thanks
Great