Jopto 4Pcs Flexible Shaft Couplings 5mm to 8mm Stepper Motor Coupler Aluminum Alloy Joint Connector Compatible with Creality CR-10 CR-10S S4 S5 Makerbot RepRap Prusa i3 3D Printer or CNC Machine

• Made of premium aluminum material, it is durable and long lasting use.
• The high quality shaft coupler is widely used to connect servo motor, stepper motor, encoder, screw driving, machine platform, etc.
• The motor shaft coupler provides an extremely tight grip without marring the shaft.
• Compatible with stepper motors (for 5mm shaft diameter). Fits for RepRap 3D Printers or small CNC machines.
• The shaft couplers are widely applied to small CNC machines encoding and 3D printers Z shaft coupling, simplifies the debugging difficulty.

Features: Made of premium aluminum material, it is durable and long lasting use. Fits for RepRap 3D Printers or small CNC machines. Can absorb vibration, appropriate a large torque transmission. Wear resistant, high hardness and excellent response. Simple structure, easy to install, buffer, shock absorption, wear, easy disassembly. Flexibility of this coupler removes stress between motor and driving component. Material: Aluminum Alloy Color: Black Size: 2.5 x 1.9 x 1.9cm Hole Diameter: 5mm to 8mm Weight: 14.9g Package Content: 4 x 3D Printer Flexible Couplings