Small Bowl Ribs are designed to give as many radius sweeps on the clay as possible.  They are smaller in the front and bigger in the back and are a workhorse of a rib, especially if you are throwing big pots.

All Mudtools polymer pottery ribs are made of a unique flexible material that will not develop burrs or cracks under normal use. We’ve found that over time the rib becomes even more polished. Each polymer shape is available in a variety of hardness. 

Red- Very Soft
Yellow- Soft
Green- Medium
Blue- Firm