Aopin 4mm to 4mm Rigid Couplings Set Screw Shaft Stepper Motor, Length 25mm / 1" Motor Coupler Connector Rigid with for 3D Printer, RC Robot, Car Model Shaft, CNC Machine, DIY Encoder 4 Pcs 4 to 4 Blue Size:4 to 4 Our washers offer a flat

Our washers offer a flat bearing surface that distributes the weight ensuring a secure hold

Blade: high-quality stainless steel / fluorine coating

We sell steel

Tool Box Case Trunk and More (4

Aopin 4mm to 4mm Rigid Couplings Set Screw Shaft Stepper Motor, Length 25mm / 1" Motor Coupler Connector Rigid with for 3D Printer, RC Robot, Car Model Shaft, CNC Machine, DIY Encoder 4 Pcs 4 to 4 Blue Size:4 to 4 Our washers offer a flatAopin 4mm to 4mm Rigid Couplings Set Screw Shaft Stepper Motor, Length 25mm 1" Motor Coupler Connector Rigid with for 3D Printer, RC Robot, Car Model Shaft, CNC Machine, DIY Encoder 4 Pcs Rigid Flange Coupling, Often Used In High Torque Transmission Occasions Flange coupler is produced based on International Flange Standard, widely used in model shaft connection, perfect accessories for RC Model motor. Material Is Strong And Durable, No Need To Change