12,000 RPM free speed for swirl-free finishes Durable, lightweight composite design weighs less than 2 lbs. Pad diameter: 6"This vacuum-ready, low vibration model produces an ultra-high quality finish and connects easily to central or portable vacuum systems. The IRT4151 extracts dust and particles through and around the pad keeping foreign matter away from the motor. The vacuum sanding pad features a unique design and large 1/2" diameter holes for efficient operation. Virtually all dust is instantly channeled away from the work. Rated power: .20 horsepower; average air consumption: 8 cfm; sound dBA: 78/91; minimum hose size: 5/16"; weight: 1.92 lbs.