The FBR Series High Frequency Pneumatic Roller Vibrators from Houston Vibrator are ideal for vibrating concrete forms, refractory molds, and more—for better surface finishes FASTER!  FBR SERIES High Frequency Roller Vibrators are designed for permanent installations. Models FBR-6500 and FBR-2700 are bolted directly to the form or mold.  There are single and dual roller types in the FBR Series to suit a variety of applications. All models in the FBR Series feature a simple design and rugged construction to reduce the need for regular maintenance. There are only two moving parts –no bearings. Operation is simple - just supply clean, lubricated air by connecting your air hose to the male hose barb.