Medium White Vinyl Eraser (1-3/8x7/8x1/2)
These are made from firm white vinyl rather than rubber. The vinyl is soft enough to be used as an eraser without destroying your paper; yet firm enough to remove tough pencil or charcoal lines. A favorite within the graphic art world for decades! (They are also widely used for making small hand-made rubber stamps. Simply draw your design on one side of the eraser  and then carve into it with an Xacto knife. The vinyl holds a clean edge and works great with rubber stamp pads!)