Most durable looper?

What do you think is the most durable looper? I’ve been using modded Fireballs for pretty much forever and wonder if there are others which are more durable or seem to have better material.
Plastic only.

Unleashed have always been great for me.

The gap on mine had a tendency to loosen a bit during play. They’re durable but the gap mechanism can’t hold itself consistently unless you used loctite or something along those lines.