The 20V MAX* Pencil Vibrator Kit comes with 4 Ah battery, giving you the power and runtime you need to consolidate concrete. The 1 1/8-inch diameter vibrator and 14,000 VPM (under load) deliver maximum consolidation power and efficiency. The 4 foot long flexible shaft provides ease of use and long reach.<br /><ul><li>4 foot long flexible shaft for easy use and long reach</li><li>1- 1/8" diameter vibrator delivers maximum consolidation power</li><li>14,000 Vibrations Per Minute for maximum consolidation efficiency</li></ul>