JEONIL CONCRETE VIBRATOR JIV- 50 Specification Model : JIV- 50 Vibrator DiaxLength : 50x545 ( mm) Frequency : 12000 ~ 14, 000 ( vpm) revolution of Flexible Shaft : 3000 ~ 3, 600 ( rpm) Vibration Amplitude : 2.2 ( mm) Length df flexible Shaft : Standard: 6m ( m) ( 4~ 7m: available) Weight : 22 ( kg) w/ o drive unit Electric Motor : 2HPx2P ( JGM-2) ( 20kg) Engine HP/ RPM : as required ( max) 3.5~ 6HP/ 3, 600RPM Gasoline