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Specification: Voltage: AC 220V Power: 150W Max. Valve diameter 130mm Adjustable Speed: Rotate speed: I Grade is 200r/min, II Grade is 300r/min Impact times: I grade is 400r/min, II Grade is 600r/min Rubber suckers diameter: 25mm, 30mm, 35mm Grinding valve weight: 4KG Package Included: 1 x TS-88 Valve Grinding Machine set; Note: The Photography light and different screens can make the color of the article in the picture a little different from the actual one. The measurement error allowed is +/- 1-3cm.