A countertop oven with 300° maximum temperature for baking polymer clays and other craft products. This handy countertop oven is perfect for warming/baking polymer clays or any craft product requiring heat up to 300°F (149°C). It includes a 30-minute timer to prevent over-baking and instruction book. The Polymer Clay & Craft Oven is a much more efficient way to bake polymer clay than the energy used by a home oven! Photo shows oven with Professional Bead Baking Rack and Beads. These items are not included. Capacity is 540 cu. in. and it operates on standard household current. IMPORTANT: DO NOT put craft items in a cold oven. Always preheat oven. Polymer clay as well as other craft products that require heat, cure best when baked in a properly preheated oven. To preheat, place an oven thermometer inside oven, turn the temperature dial to 265 degrees and the timer dial to 20 MINUTES. When the bell rings the oven should have reached 265 degrees. Check the oven thermometer to verify that the oven is at the correct temperature. When the correct temperature is reached, place your craft project in the oven for baking.