From OXO, this bakeware features: commercial-grade heavy-gauge aluminized steel for fast, even heat distribution and lasting durability and stability Swiss-engineered, ceramic-reinforced, two-layer commercial-grade PTFE nonstick coating that's scratch-, stain-, corrosion- and abrasion-resistant micro-textured pattern that prevents warping and ensures even baking by minimizing surface contact and promoting airflow visible pan dimension markings on top surface for quick and easy size identification square-rolled edges that add reinforcement for structure, strength and durability while providing a secure grip for easy handling and transferring to and from the oven stay-flat feature that helps prevent pans from warping PFOA-free construction hand wash This 5-piece set includes: approx. 13 x 18" half sheet pan 12-cup muffin pan approx. 1-lb. loaf pan two approx. 9" round cake pans Imported. Approx. 11.5-lb. package weight.