* Size : 1191S (Approx 15mm x 32mm x 12mm)

* Size : 1191 (Approx 22mm x 40mm x 12mm)

* Size : 1191E (Approx 22mm x 62mm x 12mm)

* Exam Grade: Specially designed to erase on the exam sheet

* Exam Sheet Scanner Compliant: Erase Cleanly, Leaving minimal traces

* Dust Free: Faster bits clump together to avoid messiness