A USA Pan jelly roll pan. Aluminized steel with Americoat silicone nonstick. Baking surface 14.25" x 9.375" x 1"; outer 14.75" x 9.875" x 1". Corrugated floor for air circulation; steel-wire rim for grip and warp resistance. Oven-safe to 450°F. Silicone, nylon, or wooden utensils only. Limited lifetime warranty. USA Pan's FAQ lists Americoat as a silicone coating made without PTFE, PFOA, PFOS, PFAS, and BPA.
The smaller everyday sheet pan we keep next to the quarter sheet. Same steel, a little more floor space.