Concept Pro combines the unique characteristics of aluminum (outstanding thermal conductivity) and stainless steel (including corrosion resistance, light weight and hygienic). Woll has managed to combine the two metals using innovative technology into a five-ply material comprised of two layers of stainless steel that seamlessly enclose three layers of aluminum Concept Pro offers many benefits including perfect, rapid thermal distribution that saves you time and energy, even heating all over, rounded lips and completely encased aluminum to avoid sharp edges and prevent corrosion. 6-1/2" x 4" H, 2.1 quart capacity