Alvin Draft-Art illustration board. High-quality, professional 20" x 30" Draft-Art illustration board has super WHITE surface. Alvin Draft-Art Hot Press features a super smooth surface perfect for detailed pen and ink or silkscreen work. Comparable to Bainbridge #172. Surfaces on all illustration boards are securely mounted to warp-resistant chipboards with smooth, GRAY reverse sides. Pack of 25. 0.55 pt thickness. Alvin hot press illustration boards are quality-made in the USA.