The Lovibond Cylindrical Water Testing Tubes are made of high-quality material, and are compatible with MD100, MD200, and PM600 photometers. Each tube has a cylindrical shape with a diameter of 24mm and a height of 48mm. The tubes come with secure lids, providing a tight seal for accurate and reliable results. They are genuine Lovibond products, known for their precision and reliability. Plastic tube 24 x 48mm 5 pack
