<b>4-Pack 7mm Flexible Coupling Connector for Any Motors with Shaft Diameter of 0.275in/7mm - Car Wheels Tires Shaft</b><br><br><br><b>Specification</b><br><br>Material: Brass<br><br>Side length: 7mm/0.275 inch<br><br>Diagonal: 0.535''/13.6mm<br><br>Hexagon width: 0.472 ''/ 12 mm<br><br>Height: 0.708 ''/18mm<br><br>Cylindrical outer diameter: 0.452 ''/11.5mm<br><br>Side thread: M4<br><br>Bottom thread: M4<br><br>Applicable machine shaft: 7mm<br><br>Dimension:18 x 11.5mm/0.71 x 0.45"(L x Dia)<br><br><br><b>Application</b><br><br>Coupler copper shaft coupling for the automotive tires DC motor robot car.<br><br><br><b>Package include</b><br><br>4 x Hexagon motor flexible coupling<br><br>2x Allen Wrench<br><br>8x Screws.