Specifications: 1) defrosting heater: applicable to indirect-cooling refrigerator, cooler, air-conditioner, pipe heater and some home appliance. 2) material: quartz tube 3) ambient temperature: -60c ~ +85c 4) resistant voltage in water: 2, 000v/min (normal water temperature) 5) insulated resistance in water: 750mª+ 6) power error (resistance): a7% 7) firmness of connection end: ²50n 8) heavy duty glass construction 9) protective oxide coated element wire for long-term heater life 10) high temperature molded silicone end caps 11) special hard end caps 12) can be manufactured to proper length Any