Alvin - Fineline Mechanical Pencil - Eraser Refills - Fineline Mechanical Pencil Eraser Refills from Alvin contains three pink plug erasers of superior erasing quality. These Mechanical Pencil Eraser Refills will fit all Alvin fineline mechanical pencils. Alvin is one of the primary sources for drafting supplies and drawing equipment in the country. Creative Coldsnow is a pround retailer of Alvin graphic arts, drafting and fine arts products.