Sadana Brothers offers Wave Demonstrating Snaky Spring. Sadana Brothers is an ISO 9001: 2008 accredited supplying a wide range of Laboratory and Scientific Equipments including Heat Measuring Instruments, Light [Optics] Instruments, Mechanics Instruments, Sound Measuring Instruments and Laboratoryware. The Wave Demonstrating Snaky Spring is a closely wound spring of 20 mm diameter and is used to study and demonstrate wave motion. The Wave Demonstrating Snaky Spring is available in the length of 2m and can be extended up to 10m.