Description:Material: Bearing Steel; Groove Type: U GrooveGroove Width: 2mm / 0.09 inch; Shaft Hole Diameter: 4mm / 0.16 inchOverall Size: 13x4mm / 0.51x0.16 inch (Dia. x Thickness)DIY gadgets for you to build a camera track system and repair furniture. Widely used in sliding door and windowSuitable for all kinds of industrial equipment, drive mechanical equipment, printer machine, furniture hardware, office equipment and so on.
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