U/V Groove Metal Pulley Ball Bearings Wheel Steel Guide Roller Bore 3/4/5/6mm

The U-Type/V-Type Groove Design of the Pulley and Its Smooth Surface Make It Stable and Will Not Deviate When Sliding. M6 18.5mm Screws Are Used With U-Shaped 6mm Hole Bearings And Require Tightening With An M3 Hex Wrench.

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