Product: QRB1 photoresistor type flame detection sensor for oil burner machine parts. Material: This flame detector is made of PP material, ensuring durability and long-term performance. Product Size: The product measures 50 cm in length, making it suitable for use with oil burner machines. Feature: This sensor is designed to detect flame efficiently and accurately, enhancing the safety and efficiency of your oil burner machine. It is an essential component for maintaining optimal equipment operation. Usage: QRB1 photocell resistor flame detection sensor for waste oil burners. Specifications: - Material: PP - Size: 50 cm (19.69 inches) Package Includes: 1 piece QRB1 flame detector Note: Please allow slight measurement deviations of 1–2 cm due to manual measurement.