National Brand 42-389 Computation Pad, 200 Sheets, 8.5 x 11", Margin Ruled Front, 5x5 Cross Section Back These computation/engineering pads are precision-lined to make diagramming easy. Pads are printed 5 squares per inch on one side, plain on the other with margin ruled frame border. Sub 16 Eye-Ease paper is lithographed with green ink. Only frame border will print when copied. Three-hole punched.