RB4 (3 1/2") Potter's Ribs are made from smooth-finished hardwood, and employ the basic shapes required for opening, shaping, curving, smoothing and trimming wet clay on the potter's wheel. The RB4, in the picture, is the bottom, more rounded rib.
WARNING: This product can expose you to chemicals including Silica, crystalline (airborne particles of respirable size), which are known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.