Winco Stainless Steel 32-Qt Master Cook Stock Pot With Cover (5 mm aluminum core NSF). The Winco 32-Quart Master Cook Stock Pot with Cover features tri-ply construction with a 5 mm aluminum core for superior, even heating. Made from heavy-duty 18/8 stainless steel, it’s built for commercial kitchens with sturdy riveted handles for a secure grip. Its wide, flat base and high walls make it perfect for boiling, simmering, and stewing. Induction compatible, dishwasher safe, and NSF certified for professional use.