The new Hybrid Heads internal concrete vibrators from Wacker combine the technology of the round-head and square-head designs. The result, says Wacker, is more surface area that promotes maximum energy transfer to the concrete. The Hybrid Head also incorporates an “optimized” eccentric weight, which is designed to increase the amplitude of operation. The Hybrid Head vibrator series includes the H 25HA (1-inch diameter), H 35HA (1-3/8-inch diameter), H 45HA (1-3/4-inch diameter) and the H 50HA (2-inch diameter).