1980s Thermo-Core Temp Tone Thermium Multi-Plex Stainless Steel 12pc. This cook ware set is in its original packaging and includes temp tone cookbook, stainless steel utensils, stainless steel cleaner and additional original package accessories. Each lid has the Temp-Tone vents / open or close as needed – each pan is stamped on the side: Thermo-Core, Thermium Multi-Plex, Stainless Steel, Made in U. Thermium Multi-Plex Stainless Steel pots are easy to clean and made with heavy stainless steel, ensuring they will last for years to come. These pots are an original, licensed reproduction from the United States and have unique features such as with vented lids. The set would make a great addition to any kitchen and is perfect for vintage collectors. This high-quality cookware is a must-have for any kitchen. Its durable construction ensures even cooking and long-lasting use. The sleek design adds a touch of style to any countertop. Perfect for collectors of unique cookware, this piece is sure to impress. Use it to cook your favorite meals or display it as a decorative item in your home. The thermo core technology ensures perfect cooking every time, making it a great addition to any kitchen.