RL Treats Aluminum Oven Liners Pack of 12 Never clean or scrape the bottom of your oven again - Collects all drips, drops and spills. Multi purpose liner - Works great and safe to use as an oven or pan liner, baking/cooking sheet or mat, easy to trim for a custom fit. Place liner ONLY on bottom rack NOT on oven floor Bake without worry, convenient pack of 12 for great price so you always have them when you need them