Brand: SureMotion Item: Drive coupling Material: Stainless steel Outside Diameter: 19.1mm Bore Diameter: 1/4in Attachment Style: Setscrew Overall Length: 19.1mm Coupling Type: Servo-beam Rated Torque: 1.4 N-m Maximum Angular Misalignment: 7.0 degrees Coupling Size: 19 Maximum RPM: 10000 Maximum Parallel Misalignment: 0.51mm SureMotion drive coupling, servo-beam, stainless steel, setscrew, size 19, 1/4in bore.