Vollrath 2-Piece Wear-Ever Half-Size Sheet Pans Set, 18-Inch x 13-Inch, Aluminum COMMERCIAL QUALITY: Made of durable 13 gauge aluminum, these professional-weight baking sheet pan features an open rim and is heavier in gauge than that of standard home bakeware PERFECT HEAT DISTRIBUTION: The durable, aluminum construction bakes evenly and browns uniformly, while the light color prevents overbrowning OPEN BEAD: Baked goods rise and bake evenly due to aluminums superior heat conductivity and open beads pans are NSF listed. SPACE SAVING DESIGN: The stackable tapered design is ideal for space saving, and can easily fit in standard baker's racks. HAND WASH ONLY: To preserve quality and keep your product in best working order, this item should only be hand-washed and sanitized.