Cap Feeder Upgrades specification should start with the real closure.
Some cap feeding problems can be improved by upgrading the chute, adding sensors, changing hopper feed control or reviewing change parts. The first step is to identify whether the issue is cap variation, wear, output mismatch or poor integration.
For a better buying decision, the useful comparison is not only hopper size or headline speed. It is how the feeder behaves with your closure, how the capper receives the cap and how easy the line is to run after changeover.
The safest specification route is to start with real closures, target output, line photos and the exact point where the cap must be presented. That avoids choosing a feeder on a generic speed figure that does not match the cap or capper.