... electric oven's bottom, used for catching all the messy. PTFE baking sheet/oven linerIt slides beneath your electric oven's ... hard scrubbing everytime. It will not affect browning or slow-cooking, and resists heat to 550 degrees dishwasher-safe. For electric ... . For gas oven, place on bottom rack.Packing:1pc/polybag PTFE/TEFLON oven line, baking sheet, baking mat, pastry mat