E31. Tombow Mono Dust Catch Eraser. Approx. 2" x 15/16" x 7/16".
Made of a tacky black polymer that catches and holds the "dust" created when erasing guidelines and other pencil marks. No small eraser bits to dust off! As the eraser is used up, you slide it forward out of its paper sleeve (100% recycled), which protects the rest of the eraser until it is needed.