Sympathetic Chord Products Category : Physics, Energy > Physical Instruments, Experiment INQUIRY Details 1pcs of electronic sound box on 2500Hz, use in conjunction with resonance tube printed with scales.The tube with Dia 4mm,installed on the base of 450*100*30mm. Send Inquiry Name:* E-mail:* Tel: Content:* Verification Code:* (All * must be filled in) [ Previous: ] [ Next: ] Related Products Force Table (Composition and Separation of Force) Digital Ammeter DC Coil Photoelectric Timer Line Demonstrator B High-Temperature Diffusion Cloud Chamber Waveform Generator String Waves Apparatus