Specification Brand : IOFIT BulletPoint1 : Flange coupling is made of 45# steel, heat and electroplated process make it sturdiness and insulation. BulletPoint2 : Flange coupling rigid flange disc shaft couplings optical axis easy for installment and replacement. BulletPoint3 : A special coupler, which can fix one shaft to a plane and install other parts on the shaft easily. This seat could make your shaft more stable. BulletPoint4 : Type: Flange Shaft Coupling, suitable for model shaft connection, perfect accessories for RC Model motor, etc. BulletPoint5 : Good Workmanship: Exquisite workmanship, beautiful appearance, small size, providing you great using experience. ExternallyAssignedProductIdentifier : 9436192137964 ItemName : IOFIT 1/3Pcs 3/3.17/4/5/6/6.35/7/8/10mm Rigid Flange Coupling Motor Guide Shaft Coupler Power Transmission Parts Motor Connector (Size : 3pcs 3mm) ItemPackageQuantity : 1 ItemTypeKeyword : set-screw-couplings Manufacturer : IOFIT NumberOfItems : 1 PartNumber : IOFIT ProductDescription : Please Noted: Package include:Coupling*1+ machine screw*2+allen key*1(Only one key is delivered per order.) Size description: The dimensions of the inner diameter of 3mm, 3.17mm, 4mm, 5mm, 6mm and 6.35mm are: Outer diameter of the cylinder: 10mm, Height of the cylinder: 10mm, Total height :12mm, Distance between the holes on the opposite side of the base is 16mm. The fixing hole screws are M3. The inner diameter of 7mm, 8mm and 10mm are three sizes: Outer diameter of the cylinder :16mm, Height of the cylinder: 10mm, Total height:13mm, Distance between the holes on the opposite side of the base is 24mm, and the fixing hole screws are M4. ProductSiteLaunchDate : 2023-09-27T03:30:20.511Z Size : 3pcs 3mm UnspscCode : 31161700