Size: 230 * 280mm (9 * 11 inch)
Packing: 500 sheets/carton
Material: silicon carbide waterproof paper "soft vellum"
Grid: 220#-7000# in diffirent color
Blue Color: #60 80 150 180 220 240 320 400 600 800 1000 1200 1500 2000 2500
Yellow Color: # 3000 5000 7000