3mm 4mm 5mm 6mm 7mm Hexagonal Copper Coupling Coupler for Robot Car Wheel

Description
The clamping screw aperture: 3mm
The axial screw aperture: 4mm
The axial installation diameter: 3mm/4mm/5mm/6mm/7mm
The edge to edge size: 12mm
The total length: 18mm
Package1x Coupler
2x screws

Order Note:Order this product,please provid the option as follows to order notes on checkout page.
Size 7mm/Size 6mm/Size 5mm/Size 4mm/Size 3mm/