Specification Brand : Marhynchus BulletPoint1 : These couplers are made of iron materials and electroplating, which are sturdy and . BulletPoint2 : 100% brand new and . BulletPoint3 : The coupling can easily install other accessories on the shaft. BulletPoint4 : A flange coupler is a kinds of special coupler that can fix a shaft on a flat surface. BulletPoint5 : This type of coupling is mainly used for coupling electric motors. Color : Silver ItemName : 2pcs M3 Flange Coupling Motor Shaft Coupler Connector ID 5mm OD 10mm for Coupling Electric Motors ItemPackageDimensions_Height : 2 centimeters ItemPackageDimensions_Length : 4 centimeters ItemPackageDimensions_Width : 3 centimeters ItemTypeKeyword : set-screw-couplings Manufacturer : Marhynchus Material : Carbon Steel ModelNumber : Marhynchus9yghqrkefm NumberOfItems : 1 PartNumber : Marhynchus9yghqrkefm ProductDescription : Specification: Material: Electroplated iron Inner diameter: 5mm / 0.24in Outer diameter: 10mm / 0.39in 4 holes: 3mm / 0.12in Weight: 22g / 0.8oz (approx.) Package list: 2 * Couplers 1 * Hex Key 4 * Screws