Replace it every 60 hours, otherwise the electric rotating will overheat. Carbon brush, suitable for carbon brush, used for electric knife sharpening 3000,200. Application: Suitable for 3000, 200. installation : Step 1: Use a wrench to open the carbon brush cover. Step 2: Take out the carbon brush. Step 3: Replace the carbon brush with a new one. Step 4: Use a wrench to lock the lid firmly. Note: These brushes should be replaced every 60 hours. Size: about 48x48x10mm Material:Carbon + metal colour:As shown Package Contents: 10 x Carbon Brushes Only the above package content, other products are not included. Note: Light and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.
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