Milky white spiral quartz tube devised for laboratory applications, ensuring durability and reliability. Features an external diameter of 120mm and an inner diameter of 100mm, making it ideal for various experimental setups. Constructed with 5.5 coils, providing optimal performance for fluid dynamics and physics experiments. Coil tube dimensions: OD 10mm and ID 8mm, tailored for precise measurements and efficient flow. Manufactured in Mainland China, this quartz tube is free from harmful chemicals, ensuring in your experiments., Manufacturer: HKHKH