The body is made of aluminum material and the dustproof nut is built in to effectively prevent dust,water ,and dustproof nut is built in to effectively prevent dust,water,and rust. High rotation accuracy, high-precision spindle, Dynamic balance test before assembly High speed, high run-out accuracy, Long service life,no burr in engraving. front cover to prevent dust and liquid from entering the spindle. including the spindle details power, voltage, speed, fre-quency, etc. connected to inverter water pipe connect to water pump., Manufacturer: QAXRZCUCD