Kila Chef Tri-Ply Copper Bottom Frying Pan Copper heats quickly and evenly for perfect control. This is a thick and heavy professional quality pan. 1.5mm copper clad 3.5 total thickness for superior heat conduction and control The core layer is 1.5mm aluminum, and the cooking surface is 0.5mm stainless steel Stay cool ergonomic handle with steel rivets 11" (28cm) diameter and 2.0 inch (5cm) sloped sides