Features:

• Rigid shaft coupling, compatible with a 3D printer, CNC machine, stepper motor, etc.
• 5mm to 8mm bore, total length 25mm, outside diameter 14mm.
• Made of high-quality aluminum alloy, durable and wear-resistant.
• High torque with rigidity, low inertia, and excellent sensitivity.
• Compatible with NEMA 17 stepper motors(for 5mm shaft diameter).

Specifications:

• Color: Silver
• Material: Aluminum Alloy
• Quantity: 1pc
• Bore Diameter: 5mm to 8mm
• Outside Diameter: 18mm
• Length: 23mm
• Item Weight(each): 18.5g / 0.7oz

Packing List:

• 1 * Rigid Coupling