Specification Brand : Hyuduo BulletPoint1 : It is stable and has great performance while using. BulletPoint2 : Professional and practical design with beautiful appearance, easy to carry and use. BulletPoint3 : It is made of glass fibre with great elasticity and flexibility. BulletPoint4 : It is made of premium material, and has long service life. BulletPoint5 : It can withstand high temperature and insulated,safer to use. IncludedComponents : No ItemName : 8 Font Flexible Coupling, 8 Font Flexible Coupling, Flexible Shaft Coupling for Encoder, Cylindrical Connectors ItemPackageDimensions_Height : 4 centimeters ItemPackageDimensions_Length : 5 centimeters ItemPackageDimensions_Width : 4 centimeters ItemTypeKeyword : multi-flex-couplings Manufacturer : Hyuduo ModelName : Hyuduonhusgkbdaz ModelNumber : Hyuduonhusgkbdaz NumberOfItems : 1 PartNumber : Hyuduonhusgkbdaz ProductDescription : Specification: Torsion: 2N.m Axle Hole Diameter:6*6mm/0.24*0.24in Both Ends Outer Diameter: 20mm/0.79in Maximum Rotate Outer Diameter: 28mm/1.1in Length: 37mm/1.46in Maximum Rotation Speed:5000r/min