3-8mm Metal Pulley Wheel U/V Grooved Sealed Ball Bearings Rope Wire Guide Roller

M8 28mm screws are used with U-shaped 8mm bore bearings, and need to be tightened with M4 Allen Wrench. Use: V-shaped U-shaped bearing pulley, inner bore with bearing, there is a groove on the circumference, and a bearing at the center hole, which is suitable for making static pulleys, dynamic pulleys, crane models, which is conducive to efficient rotation.

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