Faber Castell : Perfection Pencil : Double Ended Eraser | Jackson's Art Supplies
Amazon.com : Faber-Castell Eraser Pencil - Perfection art eraser pencils for drawing, artist supplies, Dual function for erasing Ink and colored pencils - 3 Pack : Office Products
Faber Castell Perfection 7057 Eraser Pencil | George Weil Art Supplies