concrete vibratorsare driven by motor,transmitted by flexible shaft,speed increased through planet structure,good mechanical performance, low noise and safer operation. Specification: Diamter:70mm Length:590mm Vibrating Frquency:200Hz Vibrating Amplitude:1.2mm Diameter of Flexible hose:45mm Outside dia of Fiexible Shaft:20mm Innei Dia of Flexible Shaft:13mm Weight with HOse:18.25kg ,