Erasers
Pink Pearl, Kneaded Erasers, Erasing Shields, Refills for Eraser Pens.
Kneaded Eraser
Kneaded erasers are soft and bendable so that you can knead them into any shape. Kneaded erasers are great for creating subtle changes.
Gum/White Erasers
Gum erasers are comparatively harder. These are good for revealing white highlights.
Blending Stumps
Blending stumps are also called tortillons. They are good for blending in smaller details.
Paper Towels
These can be used for blending large areas. These are also effective for rubbing vine charcoal sketches.