This replacement flexible tubing is designed for the Eisco Labs Resonance Apparatus (PH0720) and includes a plastic end that fits onto the resonance tube. The tubing measures approximately 39.50 inches (1000mm) long with a 0.3125 inch (8mm) inner diameter and 0.4375 inch (11mm) outer diameter. The clear tubing may have light manufacturing oil that aids beaker-end installation. Serves as a replacement part for continued use of the resonance apparatus in physics classrooms studying sound waves and resonance.