Shaped like traditional kidney ribs, these synthetic sponges are the best, toughest and most consistent sponges available. The blue sponge has proven its toughness many times in our classroom studio.
The Blue Workhorse is a great all-purpose pop-up sponge made of a very absorbent open-cell material. We’ve shaped it like a potter’s rib to fit comfortably in the palm of your hand. Dyed with a natural pigment, the color will fade with use.
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