Description Internal concrete vibrators use the eccentric principle. 18000rpm of the drive unit translates via the flexible shaft into frequency about 280 HZ in the poker head. It is more silence than pendulum type vibrator and also higher efficiency. It is used with electrical motor and has 4 standard poker diameters. The vibrator poker is top of the range poker head suitable for professional application. EV serials vibrator poker 4~6m length, Bar diameter 28mm, 32mm, 38mm, 45mm
