The VRHB Dual Roller Series portable vibrators are ideal for applications which respond well to high frequency, adjustable rotary vibration. In applications such as placing refractory and other lining materials, concrete, or similar materials, Vibratek’s VRHB Vibrators shorten pouring time, speed consolidation and increase compaction. VRHB Dual Rollers also aid material flow through hoppers, bins, railcars, chutes and screens.