ITEM NAME:Diameter 5mm to 8mm Aluminum Shaft Coupling Flexible Coupler Motor Description: - Model: Flexible Coupling Shaft Coupler - Material: Aluminum Alloy - Size: 5mm×8mm×26mm - Usage: Suitable for Creality 3D Printer CR-10 Series. Package Included: 1 Piece Couplings.Model: Flexible Coupling Shaft Coupler. - Size: 5mm×8mm×26mm. - Usage: Suitable for Creality 3D Printer CR-10 Series. - Material: Aluminum Alloy. 1 Piece Couplings.