ITEM NAME:DIY Accessory 6mm Motor Shaft Coupler Rigid Flange Coupling 2.24 x 2.24 x 0.98 Description: Easy to install and uninstall. Suitable for 100mm omnidirectional wheel and McNaim wheel. Flexibility of coupling shaft removes stress between the motor and driving components. High precision,simple appearance, light weight and high strength. It is one of the good accessories for model making. Widely used in automotive models, ship models, hardware, molds, mechanical transmission occasions. Specification: Product size: 56.8x56.8x25 mm / 2.24 x 2.24 x 0.98 inches Material: aluminum alloy Outer diameter: 56.8 mm Cylinder diameter length: 26.4mm Internal diameter: 6mm Package Includes: 1 Piece Shaft Coupler SKU: DMO0012579373013728.Flexibility of coupling shaft removes stress between the motor and driving components. 1 Piece Shaft Coupler. Suitable for 100mm omnidirectional wheel and McNaim wheel. High precision,simple appearance, light weight and high strength.