Specification AgeRangeDescription : Adult Brand : Jwthee BulletPoint1 : 【Wide Range of Use】--- The flange coupler is produced based on International Flange Standard, mostly used to couple electric motors allows to mount other accessories on the shaft easily. BulletPoint2 : 【M4 Ri gid Flange Coupling Connector】--- A special coupler, which can fix one shaft to a plane and install other parts on the shaft easily. Double connection points fasten the coupler tightly. BulletPoint3 : 【Standard Specification】--- Motor Shaft Coupler Inner diameter: 12mm / 0.47in. Outer diameter: 18mm / 0.71in. 4 holes: 4mm / 0.16in BulletPoint4 : 【Reliable Material】 --- The Motor Coupling Connector is made of fine plating steel, heat and electroplated process make it sturdiness and insulation, striking shaft more stable and easy for installment and replacement. BulletPoint5 : 【Package Include】--- The Motor Guide Coupler is packaged with 2 pack Couplers + 2x M4 Wrench + 4 x M4 Fastening Screw. Color : 10mm EducationalObjective : Imagination Development ExternallyAssignedProductIdentifier1 : 0798957661015 ExternallyAssignedProductIdentifier2 : 798957661015 FinishType : Finish IncludedComponents : inc ItemDisplayWeight : 0.02 kilograms ItemName : 2pcs M4 R igid Flange Coupling Connector, Motor Guide Shaft High Hardness Coupler Connector ID 12mm OD 18mm for Couple Electric Motors ItemPackageDimensions_Height : 2 centimeters ItemPackageDimensions_Length : 8 centimeters ItemPackageDimensions_Width : 8 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : set-screw-couplings Manufacturer : Jwthee ManufacturerMinimumAge : 48 Material : Aluminum ModelName : SPYMINNPOOn2d4z7xov9 ModelNumber : SPYMINNPOOn2d4z7xov9 NumberOfItems : 1 PartNumber : Jwtheezcosnv9rb5 PowerSourceType : PowerSource ProductDescription : Features: Made of premium iron material with electroplating, these couplers are sturdy and du rable. A flange coupler is a kinds of special coupler that can fix a shaft on a flat surface. Electroplated iron, good co rrosion resistance The coupler allows to mount other accessories on the shaft easily. This type of coupling is mostly used to couple electric motors. Specification: Material: Electroplated iron Inner diameter: 12mm / 0.47in Outer diameter: 18mm / 0.71in 4 holes: 4mm / 0.16in Weight: 55g / 1.9oz (approx.)