Alvin Quadrille Paper Pads contain 50 sheets of strong, opaque vellum tracing paper for drafting and architecture projects. Made of 100% new cotton rag fibers, the acid-free sheets feature a non-reproducible blue grid on one side with 4x4 squares per inch. The paper is laser, copier, and inkjet compatible and accepts both pen and pencil with no ghosting, smearing, or smudging—keeping your work pristine. - Alvin Quadrille Paper Pad - 11" x 17", 50 SheetsPaper Quadrille, 11X17IN 4X4 50PAD -