Specification Brand : Zeberoxyz BulletPoint1 : Shaft Coupling Size:L25mm x D20mm/0.98inch x 0.79inch( L*D), Bore Diameter: 5mm to 8mm / 0.19inch to 0.31inch, Shaft Range: 5mm to 8mm / 0.19 to 0.31 inch BulletPoint2 : Material: Made of aluminium alloy material, light, anti-oxidant, and anti-corrosive, delicate CNC cut with outstanding appearance, high precision fine workmanship,long service life BulletPoint3 : Feature: Screw Type(Coiling Clamping),They are not easy to loosen,Main Color: Silver tone BulletPoint4 : Function: Provides torque transmision and alignment, Cost effective coupling design BulletPoint5 : Widely Used: Used for transmit motion and widely used in DIY model such as small CNC machines, 3d printer Z shaft coupling , car or boat etc. as connector for different parts as joint connector Color : Silver DriveSystem : Shaft Coupling ExteriorFinish : Aluminium Alloy ExternallyAssignedProductIdentifier1 : 791783537158 ExternallyAssignedProductIdentifier2 : 0791783537158 FinishType : Aluminium alloy GpsrSafetyAttestation : 1 GradeRating : Commercial ItemName : Zeberoxyz 2PCS Shaft Coupling 5mm to 8mm Aluminum Alloy Joint 25mm Length 20mm Diameter Stepper Motor Connector Rigid Coupler for 3D Printer CNC Machine DIY Model (5x8mm ItemPackageDimensions_Height : 7.1882 centimeters ItemPackageDimensions_Length : 2.0066 centimeters ItemPackageDimensions_Width : 4.5974 centimeters ItemPackageQuantity : 1 ItemTypeKeyword : set-screw-couplings Manufacturer : Zeberoxyz Material : Aluminum MeasurementSystem1 : Metric MeasurementSystem2 : Inch MetalType : Aluminium Alloy ModelNumber : GX20250506 NumberOfItems : 2 NumberOfPieces : 2 PartNumber : ZE008 ProductDescription : Product Specification: Product Name: Silver 5mm to 8mm Shaft Coupling Type: Screw Type Shaft Usage: 5mm to 8mm / 0.19inch to 0.31inch Size: L25mm x D20mm/0.98inch x 0.79inch( L*D) Material: Aluminum Alloy Main Color: Silver Tone Weight: about34g Function: used for connecting the driving shaft and the drived shaft of model motors can convey the driving force steadily in the precise coaxiality The shaft couplers are mainly used for transmit motion and widely used in DIY model such as small CNC machines, 3d printer Z shaft coupling , car or boat etc. as connector for different parts as joint connector Package Content: 2PCS Shaft Coupling 1PCS Allen Key PLEASE NOTE: Please allow 0-3mm error due to manual measurement Due to different display screens and lighting effects, the actual color of the item may be slightly different from the color shown All merchandise we sell are in good quality and under examination before they are shipped.We will try our best to avoid any quality problem. Any question or problem, do not hesitate to contact us,We will reply you within 24 hours