Are you looking for something like this?

This is the 1" Nano Jr. and it has a flat thin piece between the body and tail.

But this one.

Is the 2" Nano and it has a round piece between the body and tail.

I use them both for panfish'n.
I've been using the Nano Jr. on the ice for gills and crappie.
They do well by themselves on a jig head or you can spice up your favorite hair or marabou jig too. :D

It fishes great under a bobber and seems like the little ball tail just bounces and bounces even at a rest under water, which drives the fish crazy. One awesome cold water panfishing plastic.

Hope that this helped.