Kemper Hardwood Potters Rib RB4
The Kemper RB4 Hardwood Potter's Rib is approximately 3-1/2" across.
Kemper Tools Hardwood Potter's Ribs are made for the potter's wheel.
They are made out of smooth-sanded hardwood and come in the basic shapes needed for opening, trimming, shaping, curving, and smoothing wet clay.