[Mauviel M'250C - M'Heritage] 18/10 stainless steel 18/10 stainless steel 18/10 stainless steel [Mauviel M150B - M'Tradition] 18/10 stainless steel [M'Passion - Mauviel Specialty] Varies by item - tin lined, 100% copper [M'Stone] Ceramic Nonstick coating [0] 
Interior cooking surface