What a great work, wow ! I belive this is the Mono Zero Tombow Elastomer Eraser but i am not sure, sometimes i use a BIC Galet too and i cut this eraser with a Knife. But the Mono Zero is still better for this works. I hope i can help you and that is the right eraser ;) And do you use the Faber Castell Pitt Graphite mat too, its a fantastic pencil and you dont have shining light effects on your picture.
