RioRand MA-120 Mini Car Motorcycle Amplifier 10W*2 SD USB MP3 Digital Player DC12V Powered by RioRand Advanced Technology Headstock speed: 2,000rpm Motor input: 12VDC weight:4.5KG maximum length is 30CM Material: Carbon steel, Aluminum, ABS Max. Cutting diameter: 45mm(bigger diameter is possible with intermediatepiece Center distance: 135mm(with accessories extra long machine bed can longer to 360mm)