Perfect for 100% rag paper used for graphic layout in architecture and interior design, products, packages, and illustrations. Indispensable blue lines 60 Pages 14 x 17" / A3 Different Grids: Three-point outlook diagram 45°–45° elevation 60° Three-point outlook diagram 30º–60°; 45° altitude 60°-30° two-point perspective plan 60°-30° two-point interior perspective plan Ground plan perspective from a 1-point interior perspective