Mudtools Blue Rib #4
MUDTOOLS RIBS are made from flexble material that is considered the "stainless steel" of plastics. Unlike rubber, this material will not develop burrs of cracks. In fact these ribs will burnish themselves as you use them, so, the more you use them the nicer them become.
The blue rib is a very firm flexible rib, still flexible but stiffer. Great for high burnish and throwing large works.