Internal Concrete Vibrators Return to Product Categories Flexible Shaft Concrete Vibrators Electric motor driven flexible shaft concrete vibrators. High Cycle Concrete Vibrators 180 Hertz, 230 volt motor-in-head style High-Cycle concrete vibrators. Pneumatic Concrete Vibrators Air powered internal concrete vibrators. Gas Backpack Concrete Vibrator Gasoline powered backpack with a 2.5 HP Honda engine for flexible shaft concrete vibrators. Electric Backpack Concrete Vibrators Backpack with a 2.5 HP or 1.5 HP electric motor for flexible shaft concrete vibrators. Flex Power 5 Gasoline Concrete Vibrator Gasoline powered drive system with a 5 HP engine for flexible shaft concrete vibrators up to 50 feet in length. RG60 Universal 115-volt Concrete Vibrator The original 115 volt motor-in-head style electric concrete vibrator suitable for 5″ slumps or wetter.