Vinod Platinum triply stainless steel series is made up with SAS technology which is a triple layer construction of stainless steel aluminium and stainless steel. The inner layer is made up of food safe AISI 304 stainless steel which is hygienic stainless steel and rust free.The middle layer is consists of aluminium throughout this ensures in even heat distribution and uniform cooking of food.The third layer is made of AISI 430 stainless steel for induction compatibility. Additional Information> Base Gas Compatible and Induction Compatible Material Triply Stainless Steel Dishwasher Safe Yes Warranty Details 60 Months Warranty 2 PC Extra Deep Kadai With Lid 1.5 L Capacity (20 cm Diameter) and Frypan 20 cm Diameter - Silver (Induction and Gas stove Friendly) 3 PC Extra Deep Kadai With Lid 1.5 Litres (20 cm Diameter) Frypan 20 cm Diameter and Milkpan 1.5 Litres (16 cm Diameter) - Silver (Induction and Gas stove Friendly) Silver