Pneumatic vibration 2 w / m 4.90 meter vibration 4 Husqvarna AY is a series of strong, durable and economical pneumatic concrete vibrators. It is driven and cooled by compressed air and is ideal for vibrating walls and columns. The easy-to-twist ball stop handle provides maximum efficiency and helps avoid air leakage and energy loss. The lack of moving parts in the hose reduces hand / arm vibrations and