NBK - XUT-25C-6-12 Cross Joint Flexible Coupling, Clamping Type, 0.98"x1.06"x1.06", Bore Diameters 6 mm and 12 mm, Rated Torque (N.m) 1.2, Max Rotational Frequency (min-1) 25000, Moment of Inertia 2.7x10^-6, Static Torsional Stiffness (N.m/rad) 900, Max Lateral Misalignment (mm) 0.2, Max Angular Misalignment 1°, Mass 33 g.