Specification Brand : QANYEGN BulletPoint1 : ENHANCED PERFORMANCE: This Flexible Spider Shaft Coupler improves the performance of CNC stepper motors by providing a reliable, efficient connection between the motor and shaft. BulletPoint2 : DURABLE CONSTRUCTION: Constructed of high-quality urethane material, this flexible coupler is built to withstand heavy-duty use and ensure long-lasting performance. Simple construction allows for easy installation and disconnection. BulletPoint3 : FLEXIBLE DESIGN: This jaw shaft coupler has a compact size, smoothly surfaces, and a flexible spider structure that accommodates minor misalignments and vibrations, resulting in smoother operation and less wear and tear. BulletPoint4 : EASY INSTALLATION: This CNC stepper motor coupler connector has an outside diameter of 30 mm x 40 mm long, making it compatible with a wide range of stepper motors for easy installation. BulletPoint5 : VERSATILE APPLICATIONS: Suitable for a wide range of CNC applications, this coupling can be used in robotics, automation, 3D printers and other precisionly machinery to improve motion control. ItemName : Couplings, Flexible Spider Shaft Couplers, CNC Stepper Motor Couplers for Shaft Drives in All Kinds of Machine Tools ItemPackageDimensions_Height : 0.5 inches ItemPackageDimensions_Length : 10 inches ItemPackageDimensions_Width : 5 inches ItemPackageQuantity : 1 ItemTypeKeyword : spider-couplings Manufacturer : QANYEGN Material : Steel NumberOfItems : 6 PartNumber : QANYEGN2zyguf4wkq ProductDescription : Specifications: Elastomer material: imported polyurethane Sleeve material: high strength aluminum alloy Allowable speed: 10000 (r/m) Allowable: 12.5 (N.M) Length: 40 mm / 1.57in Outer diameter: 30 mm / 1.18in Hole diameter: 10mm-14mm / 0.39-0.55in Weight: 58g