Tramontina Prima Stainless Steel Steamer Insert- Fits 3 and 4 quart pans. Premium heavy-gauge 18/10 stainless steel (18% chromium, 10 percent nickel for strength and stain-resistance). Tri-ply bottom construction (18/10 stainless steel + pure aluminum + magnetic stainless steel), heats quickly and evenly. Even heat distribution with no hot spots or scorching. Precision-fitted lids & reinforced pot rims for self-basting performance that locks in nutrients. Ergonomically designed stainless steel handles & knobs. Induction ready. Lifetime warranty, satisfaction guaranteed.