Specifications Heating element is laminated between two layers of 15mil fiberglass reinforced silicone rubber Silicone rubber density of 16.8oz/yd (570 grams/m) per layer Dielectric strength of over 2000 volts Adjustable thermostat: 50o to 425oF (10o-218oC)* 450oF (232oC) maximum exposure temperature on heating surface Moisture and chemical resistant Power cord 6 feet (1.8m) long with 120VAC: Standard 3-prong plug (NEMA 5-15) 240VAC: Bare wire connection The spring closure can be expanded 3\" (76mm)