High-quality, professional 15" x 20" Draft-Art illustration boards with 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. 0.55 pt thickness. PACK OF 50 illustration boards, quality-made in the USA.