Specification Brand : JZYSS BulletPoint1 : Made of premium aluminum material, it is durable and long lasting use. BulletPoint2 : General purpose power transmission coupling, also used in motion control applications and rotational power transmissions, is good replacement for your needs. BulletPoint3 : It is designed to transmit torque while damping system vibrations and accommodating misalignment to protect other components from damage. BulletPoint4 : Wear resistant ,high hardness and excellent response.Super elastic torque can absorb vibration, appropriate a large torque transmission. BulletPoint5 : Any problems you have, please no hesitate to contact us, we’re always here to help you and response to you within 24 hours. Color : Blue ExteriorFinish : Aluminum ExternallyAssignedProductIdentifier : 9395591068098 ItemName : JZYSS Shaft Coupling 2 Pcs D14L25 Aluminum Alloy Couplings Bore 3/3.17/4/5/6/6.35/7/8 Mm Blue Flexible Shaft Coupler 3D Printers Stepper Motor Part Couplings (Size : 5mm to 7mm) ItemPackageQuantity : 1 ItemTypeKeyword : beam-couplings Manufacturer : JZYSS Material : Metal NumberOfItems : 1 PartNumber : JZYSS ProductDescription : Type : Blue coupler