Feature●Easy to sharpen with a sanding block●High quality blending stumps and tortillions made from soft gray paper felt●Size no.3 (5/16") pack of 3●Easy to sharpen with a sanding block●High quality blending stumps and tortillions made from soft gray paper feltDescription Jack Richeson blending stomps are composed of tightly spiral-wound, soft grey paper. Either end can be used to smooth and blend pastels and charcoal into your artwork. Size no.3 (5/16") pack of 3.