Specification Brand : Yuecoom BulletPoint1 : High-quality plated iron material: flange coupling connector is made of high-quality plated iron material, high hardness, durability, long service life BulletPoint2 : Excellent processing: the whole flange coupling connector is processed by excellent processing, excellent workmanship, comfortable hand feeling, safe to use. BulletPoint3 : Easy to install: flange coupling connector is a special coupler that can fix the shaft on the plane, which can make your shaft more stable and easy to install and replace. BulletPoint4 : Widely used: flange coupling connector is widely used in modeling shaft connection, mainly used for coupling motor is the best accessory for RC model motor. BulletPoint5 : Package specification: flange coupling connector set contains 4 screws 1 wrench 2 couplers Color : Color ExteriorFinish : Silver ExternallyAssignedProductIdentifier : 9486095504998 IncludedComponents : No ItemName : 1Set Flange Coupling Connector, Motor Coupling Connector with 4 Screws 1 Wrench 2 Couplers for DIY RC Model Motors ItemPackageDimensions_Height : 1 centimeters ItemPackageDimensions_Length : 3 centimeters ItemPackageDimensions_Width : 2 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : set-screw-couplings Manufacturer : Yuecoom Material : Steel Material1 : Stainless Steel Material2 : Steel MetalType1 : Stainless Steel MetalType2 : Alloy Steel ModelName : Sungooyuecb83ygdux4 ModelNumber : INTSL NumberOfItems : 1 NumberOfPieces : 1 PartNumber : Yuecoomih5mrkcv8t ProductDescription : Features: flange coupling connector is made of high-quality plated iron material, high hardness, durability, long service life the whole flange coupling connector is processed by excellent processing, excellent workmanship, comfortable hand feeling, safe to use. flange coupling connector is a special coupler that can fix the shaft on the plane, which can make your shaft more stable and easy to install and replace. flange coupling connector is widely used in modeling shaft connection, mainly used for coupling motor is the best accessory for RC model motor. Package specification: flange coupling connector set contains 4 screws 1 wrench 2 couplers Specification: Material: Electroplated iron Inner diameter: 12mm / 0.47in Outer diameter: 18mm / 0.71in 4 holes: 4mm / 0.16in Weight: 55g / 1.9oz (approx.)