PA1825 Featuring built-in regulator for consistent performance. Free speed (rpm): 2,500 Spindle thread: 5/8″ – 11 Air inlet thread: 1/4″ NPT Min. air hose size (ID): 10mm (3/8″) Air pressure: 90PSI/6.2Bar Pad diameter: 180mm Overall length: 380mm Weight: 2.3kg Can be used with compounding heads and polishing sponges Supplied with auxiliary side handle and support pad for bonnet