Bienfang Raritan drawing pad, sketch pad features versatile, 70 lb. (116 gsm) heavyweight paper with an excellent tooth for subtle color and shade effects with pencil, charcoal, pastel. TOP spiral-bound drawing pad can also be used for some applications of airbrush and light washes. 30 SHEETS. Bienfang Raritan 18" x 24" spiral-bound drawing pads and sketchbooks are made in the USA.