Self-generated vacuum only.
Body is made from durable high strength material.
Lower body with low center designed for operating steady with working face.
Dustproof bearing to effectively lengthen bearing life.
Free speed: 12000 rpm
Air pressure: 90psi
Orbit dia.: 5mm
Air inlet: 1/4"
Pad dia.: 5" (6hold); Weight: 0.91kgs
Vacuum adapter size: 1", 1-1/8", 1-1/4"